diff --git a/src/main/java/com/omertron/themoviedbapi/model/AbstractIdName.java b/src/main/java/com/omertron/themoviedbapi/model/AbstractIdName.java
index e2e661ca1..77f5c8180 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/AbstractIdName.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/AbstractIdName.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -28,9 +29,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author Stuart.Boston
  */
-public class AbstractIdName extends AbstractJsonMapping implements IIdentification {
+public class AbstractIdName extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 2L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/AbstractJsonMapping.java b/src/main/java/com/omertron/themoviedbapi/model/AbstractJsonMapping.java
index ec03209c9..1440b4c04 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/AbstractJsonMapping.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/AbstractJsonMapping.java
@@ -33,6 +33,7 @@ import org.slf4j.LoggerFactory;
  */
 public abstract class AbstractJsonMapping implements Serializable {
 
+    private static final long serialVersionUID = 4L;
     private static final Logger LOG = LoggerFactory.getLogger(AbstractJsonMapping.class);
 
     /**
diff --git a/src/main/java/com/omertron/themoviedbapi/model/Certification.java b/src/main/java/com/omertron/themoviedbapi/model/Certification.java
index c705bb054..0ea16f6e7 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/Certification.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/Certification.java
@@ -21,11 +21,12 @@ package com.omertron.themoviedbapi.model;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonRootName;
+import java.io.Serializable;
 
 @JsonRootName("certification")
-public class Certification extends AbstractJsonMapping {
+public class Certification extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
     // Properties
     @JsonProperty("certification")
     private String value;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/FindResults.java b/src/main/java/com/omertron/themoviedbapi/model/FindResults.java
index 60c57be48..738f09490 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/FindResults.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/FindResults.java
@@ -25,14 +25,15 @@ import com.omertron.themoviedbapi.model.person.PersonFind;
 import com.omertron.themoviedbapi.model.tv.TVBasic;
 import com.omertron.themoviedbapi.model.tv.TVEpisodeBasic;
 import com.omertron.themoviedbapi.model.tv.TVSeasonBasic;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author stuart.boston
  */
-public class FindResults extends AbstractJsonMapping {
+public class FindResults extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("movie_results")
     private List<MovieBasic> movieResults;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/Genre.java b/src/main/java/com/omertron/themoviedbapi/model/Genre.java
index ee6e068af..ff367a8ab 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/Genre.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/Genre.java
@@ -20,11 +20,14 @@
 package com.omertron.themoviedbapi.model;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
 @JsonRootName("genre")
-public class Genre extends AbstractIdName {
+public class Genre extends AbstractIdName implements Serializable {
+
+    private static final long serialVersionUID = 4L;
     // Nothing to override from the base class.
 }
diff --git a/src/main/java/com/omertron/themoviedbapi/model/Language.java b/src/main/java/com/omertron/themoviedbapi/model/Language.java
index c15db46bc..faff5538c 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/Language.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/Language.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonRootName;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -28,12 +29,10 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  * @author stuart.boston
  */
 @JsonRootName("spoken_language")
-public class Language extends AbstractJsonMapping {
+public class Language extends AbstractJsonMapping implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
-    private static final long serialVersionUID = 1L;
-    /*
-     * Properties
-     */
     @JsonProperty("iso_639_1")
     private String isoCode;
     @JsonProperty("name")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/StatusCode.java b/src/main/java/com/omertron/themoviedbapi/model/StatusCode.java
index 28b02d1c4..8ccbbdf90 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/StatusCode.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/StatusCode.java
@@ -26,7 +26,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
  */
 public class StatusCode extends AbstractJsonMapping {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("status_code")
     private int code;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/account/Account.java b/src/main/java/com/omertron/themoviedbapi/model/account/Account.java
index e367207c1..3ed1f684b 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/account/Account.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/account/Account.java
@@ -22,8 +22,11 @@ package com.omertron.themoviedbapi.model.account;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
 
-public class Account extends AbstractJsonMapping implements IIdentification{
+public class Account extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/artwork/Artwork.java b/src/main/java/com/omertron/themoviedbapi/model/artwork/Artwork.java
index e38d3b294..05d994da3 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/artwork/Artwork.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/artwork/Artwork.java
@@ -23,6 +23,7 @@ import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.omertron.themoviedbapi.enumeration.ArtworkType;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -31,9 +32,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author Stuart
  */
-public class Artwork extends AbstractJsonMapping {
+public class Artwork extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/artwork/ArtworkMedia.java b/src/main/java/com/omertron/themoviedbapi/model/artwork/ArtworkMedia.java
index e1a18db64..5f53c3743 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/artwork/ArtworkMedia.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/artwork/ArtworkMedia.java
@@ -28,6 +28,7 @@ import com.omertron.themoviedbapi.model.media.MediaBasic;
 import com.omertron.themoviedbapi.model.movie.MovieBasic;
 import com.omertron.themoviedbapi.model.tv.TVBasic;
 import com.omertron.themoviedbapi.model.tv.TVEpisodeBasic;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -35,7 +36,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author Stuart
  */
-public class ArtworkMedia extends Artwork {
+public class ArtworkMedia extends Artwork implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     private MediaType mediaType;
     @JsonTypeInfo(
diff --git a/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenAuthorisation.java b/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenAuthorisation.java
index 4db66adf1..2d9057c08 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenAuthorisation.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenAuthorisation.java
@@ -21,10 +21,11 @@ package com.omertron.themoviedbapi.model.authentication;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
-public class TokenAuthorisation extends AbstractJsonMapping {
+public class TokenAuthorisation extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 2L;
+    private static final long serialVersionUID = 4L;
     @JsonProperty("expires_at")
     private String expires;
     @JsonProperty("request_token")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenSession.java b/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenSession.java
index 8c5f1b506..034879cc8 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenSession.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/authentication/TokenSession.java
@@ -21,10 +21,11 @@ package com.omertron.themoviedbapi.model.authentication;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
-public class TokenSession extends AbstractJsonMapping {
+public class TokenSession extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 2L;
+    private static final long serialVersionUID = 4L;
     @JsonProperty("session_id")
     private String sessionId;
     @JsonProperty("success")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/change/ChangeKeyItem.java b/src/main/java/com/omertron/themoviedbapi/model/change/ChangeKeyItem.java
index 130fd1a5c..f1e50153d 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/change/ChangeKeyItem.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/change/ChangeKeyItem.java
@@ -21,12 +21,13 @@ package com.omertron.themoviedbapi.model.change;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
-public class ChangeKeyItem extends AbstractJsonMapping {
+public class ChangeKeyItem extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
     @JsonProperty("key")
     private String key;
     @JsonProperty("items")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/change/ChangeListItem.java b/src/main/java/com/omertron/themoviedbapi/model/change/ChangeListItem.java
index f10d9dce4..c9282029c 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/change/ChangeListItem.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/change/ChangeListItem.java
@@ -21,10 +21,11 @@ package com.omertron.themoviedbapi.model.change;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
-public class ChangeListItem extends AbstractJsonMapping {
+public class ChangeListItem extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/change/ChangedItem.java b/src/main/java/com/omertron/themoviedbapi/model/change/ChangedItem.java
index 34172ffd4..57239c6f5 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/change/ChangedItem.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/change/ChangedItem.java
@@ -21,10 +21,11 @@ package com.omertron.themoviedbapi.model.change;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
-public class ChangedItem extends AbstractJsonMapping {
+public class ChangedItem extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
     @JsonProperty("id")
     private String id;
     @JsonProperty("action")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/collection/Collection.java b/src/main/java/com/omertron/themoviedbapi/model/collection/Collection.java
index 6047a4bee..d2ff61340 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/collection/Collection.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/collection/Collection.java
@@ -23,6 +23,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonRootName;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
@@ -31,9 +32,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  * @author stuart.boston
  */
 @JsonRootName("collection")
-public class Collection extends AbstractJsonMapping implements IIdentification{
+public class Collection extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/collection/CollectionInfo.java b/src/main/java/com/omertron/themoviedbapi/model/collection/CollectionInfo.java
index 0f06b273f..4b5bf9372 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/collection/CollectionInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/collection/CollectionInfo.java
@@ -22,6 +22,7 @@ package com.omertron.themoviedbapi.model.collection;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -29,9 +30,9 @@ import java.util.List;
 /**
  * @author Stuart
  */
-public class CollectionInfo extends AbstractJsonMapping implements IIdentification {
+public class CollectionInfo extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/company/Company.java b/src/main/java/com/omertron/themoviedbapi/model/company/Company.java
index 62c28bf32..f861f6e64 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/company/Company.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/company/Company.java
@@ -22,29 +22,30 @@ package com.omertron.themoviedbapi.model.company;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
+import static org.apache.commons.lang3.StringUtils.EMPTY;
 
 /**
  * Company information
  *
  * @author Stuart
  */
-public class Company extends AbstractJsonMapping implements IIdentification {
+public class Company extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
-    private static final String DEFAULT_STRING = "";
+    private static final long serialVersionUID = 4L;
     // Properties
     @JsonProperty("id")
     private int id = 0;
     @JsonProperty("name")
-    private String name = DEFAULT_STRING;
+    private String name = EMPTY;
     @JsonProperty("description")
-    private String description = DEFAULT_STRING;
+    private String description = EMPTY;
     @JsonProperty("headquarters")
-    private String headquarters = DEFAULT_STRING;
+    private String headquarters = EMPTY;
     @JsonProperty("homepage")
-    private String homepage = DEFAULT_STRING;
+    private String homepage = EMPTY;
     @JsonProperty("logo_path")
-    private String logoPath = DEFAULT_STRING;
+    private String logoPath = EMPTY;
     @JsonProperty("parent_company")
     private Company parentCompany = null;
 
diff --git a/src/main/java/com/omertron/themoviedbapi/model/config/Configuration.java b/src/main/java/com/omertron/themoviedbapi/model/config/Configuration.java
index 11e65fe50..0a1286830 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/config/Configuration.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/config/Configuration.java
@@ -22,6 +22,7 @@ package com.omertron.themoviedbapi.model.config;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.MovieDbException;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.List;
@@ -31,12 +32,10 @@ import org.yamj.api.common.exception.ApiExceptionType;
 /**
  * @author stuart.boston
  */
-public class Configuration extends AbstractJsonMapping {
+public class Configuration extends AbstractJsonMapping implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
-    private static final long serialVersionUID = 1L;
-    /*
-     * Properties
-     */
     @JsonProperty("base_url")
     private String baseUrl;
     @JsonProperty("secure_base_url")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/config/JobDepartment.java b/src/main/java/com/omertron/themoviedbapi/model/config/JobDepartment.java
index 3b7880640..ff431b394 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/config/JobDepartment.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/config/JobDepartment.java
@@ -21,11 +21,12 @@ package com.omertron.themoviedbapi.model.config;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.util.List;
 
-public class JobDepartment extends AbstractJsonMapping {
+public class JobDepartment extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
     // Properties
     @JsonProperty("department")
     private String department;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/keyword/Keyword.java b/src/main/java/com/omertron/themoviedbapi/model/keyword/Keyword.java
index 00a6b6184..ddf9c5cc8 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/keyword/Keyword.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/keyword/Keyword.java
@@ -21,11 +21,14 @@ package com.omertron.themoviedbapi.model.keyword;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
 import com.omertron.themoviedbapi.model.AbstractIdName;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
 @JsonRootName("keyword")
-public class Keyword extends AbstractIdName {
+public class Keyword extends AbstractIdName implements Serializable {
+
+    private static final long serialVersionUID = 4L;
     // Nothing to override from the base class.
 }
diff --git a/src/main/java/com/omertron/themoviedbapi/model/list/ListItem.java b/src/main/java/com/omertron/themoviedbapi/model/list/ListItem.java
index 0531db366..185cbef07 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/list/ListItem.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/list/ListItem.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model.list;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.util.Collections;
 import java.util.List;
 
@@ -30,7 +31,9 @@ import java.util.List;
  * @author stuart.boston
  * @param <T> Type of list
  */
-public class ListItem<T> extends AbstractJsonMapping {
+public class ListItem<T> extends AbstractJsonMapping implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/list/ListItemStatus.java b/src/main/java/com/omertron/themoviedbapi/model/list/ListItemStatus.java
index 63390246d..e9aa69fe2 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/list/ListItemStatus.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/list/ListItemStatus.java
@@ -21,13 +21,14 @@ package com.omertron.themoviedbapi.model.list;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  * @author Holger Brandl
  */
-public class ListItemStatus extends AbstractJsonMapping {
+public class ListItemStatus extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("status_code")
     private int statusCode;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/list/UserList.java b/src/main/java/com/omertron/themoviedbapi/model/list/UserList.java
index 4852bb894..7d34ea993 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/list/UserList.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/list/UserList.java
@@ -21,13 +21,16 @@ package com.omertron.themoviedbapi.model.list;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  * Wrapper for the MovieDbList function
  *
  * @author stuart.boston
  */
-public class UserList extends AbstractJsonMapping {
+public class UserList extends AbstractJsonMapping implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/AlternativeTitle.java b/src/main/java/com/omertron/themoviedbapi/model/media/AlternativeTitle.java
index 7efc00d7c..a6f3484d9 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/AlternativeTitle.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/AlternativeTitle.java
@@ -29,7 +29,7 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  */
 public class AlternativeTitle implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("iso_3166_1")
     private String country;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaBasic.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaBasic.java
index 4703336fd..a3324ac1f 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaBasic.java
@@ -24,13 +24,16 @@ import com.fasterxml.jackson.annotation.JsonSetter;
 import com.omertron.themoviedbapi.enumeration.MediaType;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
 
 /**
  * Basic media information
  *
  * @author stuart.boston
  */
-public class MediaBasic extends AbstractJsonMapping implements IIdentification {
+public class MediaBasic extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCredit.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCredit.java
index 134342ef3..6724f488a 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCredit.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCredit.java
@@ -22,12 +22,15 @@ package com.omertron.themoviedbapi.model.media;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class MediaCredit extends AbstractJsonMapping implements IIdentification {
+public class MediaCredit extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("credit_id")
     private String creditId;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCast.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCast.java
index 5fc858e46..c4228f1a4 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCast.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCast.java
@@ -20,12 +20,15 @@
 package com.omertron.themoviedbapi.model.media;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class MediaCreditCast extends MediaCredit {
+public class MediaCreditCast extends MediaCredit implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("cast_id")
     private int castId = 0;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCrew.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCrew.java
index 4b4eedefd..d83103c90 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCrew.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditCrew.java
@@ -20,12 +20,15 @@
 package com.omertron.themoviedbapi.model.media;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class MediaCreditCrew extends MediaCredit {
+public class MediaCreditCrew extends MediaCredit implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("department")
     private String department;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditList.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditList.java
index ec360ce66..5ec70b283 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditList.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaCreditList.java
@@ -22,14 +22,15 @@ package com.omertron.themoviedbapi.model.media;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author stuart.boston
  */
-public class MediaCreditList extends AbstractJsonMapping implements IIdentification{
+public class MediaCreditList extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/MediaState.java b/src/main/java/com/omertron/themoviedbapi/model/media/MediaState.java
index d5c32b731..ea9c07799 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/MediaState.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/MediaState.java
@@ -23,12 +23,15 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class MediaState extends AbstractJsonMapping implements IIdentification {
+public class MediaState extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/RatedValue.java b/src/main/java/com/omertron/themoviedbapi/model/media/RatedValue.java
index 139fb52b7..795a495e4 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/RatedValue.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/RatedValue.java
@@ -21,12 +21,15 @@ package com.omertron.themoviedbapi.model.media;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class RatedValue extends AbstractJsonMapping {
+public class RatedValue extends AbstractJsonMapping implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("value")
     private float value = -1f;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/Trailer.java b/src/main/java/com/omertron/themoviedbapi/model/media/Trailer.java
index 1426550d1..e7ef6fe63 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/Trailer.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/Trailer.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model.media;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -29,9 +30,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author Stuart
  */
-public class Trailer extends AbstractJsonMapping {
+public class Trailer extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("name")
     private String name;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/Translation.java b/src/main/java/com/omertron/themoviedbapi/model/media/Translation.java
index 75a5153f9..00c72d97a 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/Translation.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/Translation.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model.media;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 import org.apache.commons.lang3.builder.ToStringBuilder;
@@ -29,13 +30,10 @@ import org.apache.commons.lang3.builder.ToStringStyle;
 /**
  * @author Stuart
  */
-public class Translation extends AbstractJsonMapping {
+public class Translation extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
-    /*
-     * Properties
-     */
     @JsonProperty("english_name")
     private String englishName;
     @JsonProperty("iso_639_1")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/media/Video.java b/src/main/java/com/omertron/themoviedbapi/model/media/Video.java
index 528542d7c..6486104ea 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/media/Video.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/media/Video.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model.media;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -29,9 +30,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author Stuart
  */
-public class Video extends AbstractJsonMapping {
+public class Video extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/movie/MovieBasic.java b/src/main/java/com/omertron/themoviedbapi/model/movie/MovieBasic.java
index 94bbf84f3..58272af09 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/movie/MovieBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/movie/MovieBasic.java
@@ -22,13 +22,16 @@ package com.omertron.themoviedbapi.model.movie;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.enumeration.MediaType;
 import com.omertron.themoviedbapi.model.media.MediaBasic;
+import java.io.Serializable;
 
 /**
  * Basic Movie information
  *
  * @author stuart.boston
  */
-public class MovieBasic extends MediaBasic {
+public class MovieBasic extends MediaBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("adult")
     private boolean adult;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/movie/MovieInfo.java b/src/main/java/com/omertron/themoviedbapi/model/movie/MovieInfo.java
index cd9f345bd..6ab890c0b 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/movie/MovieInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/movie/MovieInfo.java
@@ -43,6 +43,7 @@ import com.omertron.themoviedbapi.results.WrapperMovieKeywords;
 import com.omertron.themoviedbapi.results.WrapperReleaseInfo;
 import com.omertron.themoviedbapi.results.WrapperTranslations;
 import com.omertron.themoviedbapi.results.WrapperVideos;
+import java.io.Serializable;
 import java.util.List;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
@@ -52,9 +53,10 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  *
  * @author stuart.boston
  */
-public class MovieInfo extends AbstractJsonMapping implements IIdentification {
+public class MovieInfo extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
-    private static final long serialVersionUID = 1L;
     @JsonProperty("backdrop_path")
     private String backdropPath;
     @JsonProperty("id")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCompany.java b/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCompany.java
index 3da6fee9b..4451bdfaa 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCompany.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCompany.java
@@ -21,11 +21,14 @@ package com.omertron.themoviedbapi.model.movie;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
 import com.omertron.themoviedbapi.model.AbstractIdName;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
 @JsonRootName("production_company")
-public class ProductionCompany extends AbstractIdName {
+public class ProductionCompany extends AbstractIdName implements Serializable {
+
+    private static final long serialVersionUID = 4L;
     // Nothing to override from the base class.
 }
diff --git a/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCountry.java b/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCountry.java
index b6e06337f..19932974d 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCountry.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/movie/ProductionCountry.java
@@ -22,6 +22,7 @@ package com.omertron.themoviedbapi.model.movie;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonRootName;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -29,9 +30,9 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
  * @author stuart.boston
  */
 @JsonRootName("production_country")
-public class ProductionCountry extends AbstractJsonMapping {
+public class ProductionCountry extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("iso_3166_1")
     private String country;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/movie/ReleaseInfo.java b/src/main/java/com/omertron/themoviedbapi/model/movie/ReleaseInfo.java
index 94e8f42c1..a4bb38d5c 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/movie/ReleaseInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/movie/ReleaseInfo.java
@@ -21,15 +21,16 @@ package com.omertron.themoviedbapi.model.movie;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
 /**
  * @author Stuart
  */
-public class ReleaseInfo extends AbstractJsonMapping {
+public class ReleaseInfo extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("iso_3166_1")
     private String country;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/network/Network.java b/src/main/java/com/omertron/themoviedbapi/model/network/Network.java
index cbcb69556..32930ac18 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/network/Network.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/network/Network.java
@@ -22,13 +22,14 @@ package com.omertron.themoviedbapi.model.network;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class Network extends AbstractJsonMapping implements IIdentification {
+public class Network extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/ContentRating.java b/src/main/java/com/omertron/themoviedbapi/model/person/ContentRating.java
index 24ad7a282..f1f9b8c95 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/ContentRating.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/ContentRating.java
@@ -20,12 +20,15 @@
 package com.omertron.themoviedbapi.model.person;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart.Boston
  */
-public class ContentRating {
+public class ContentRating implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("iso_3166_1")
     private String country;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/CreditBasic.java b/src/main/java/com/omertron/themoviedbapi/model/person/CreditBasic.java
index 19a3ce4a1..de8a75c43 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/CreditBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/CreditBasic.java
@@ -26,13 +26,14 @@ import com.omertron.themoviedbapi.enumeration.CreditType;
 import com.omertron.themoviedbapi.enumeration.MediaType;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class CreditBasic extends AbstractJsonMapping implements IIdentification {
+public class CreditBasic extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     private CreditType creditType;
     private MediaType mediaType;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/CreditInfo.java b/src/main/java/com/omertron/themoviedbapi/model/person/CreditInfo.java
index c8022df9c..e3274a240 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/CreditInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/CreditInfo.java
@@ -22,13 +22,14 @@ package com.omertron.themoviedbapi.model.person;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.tv.TVCredit;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class CreditInfo extends AbstractJsonMapping {
+public class CreditInfo extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/CreditMovieBasic.java b/src/main/java/com/omertron/themoviedbapi/model/person/CreditMovieBasic.java
index cd20d6718..89fe75d05 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/CreditMovieBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/CreditMovieBasic.java
@@ -21,13 +21,14 @@ package com.omertron.themoviedbapi.model.person;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.enumeration.MediaType;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class CreditMovieBasic extends CreditBasic {
+public class CreditMovieBasic extends CreditBasic implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("adult")
     private boolean adult;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/CreditTVBasic.java b/src/main/java/com/omertron/themoviedbapi/model/person/CreditTVBasic.java
index 7703ea2fa..c0dfd4ba5 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/CreditTVBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/CreditTVBasic.java
@@ -21,13 +21,14 @@ package com.omertron.themoviedbapi.model.person;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.enumeration.MediaType;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class CreditTVBasic extends CreditBasic {
+public class CreditTVBasic extends CreditBasic implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("episode_count")
     private int episodeCount;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/ExternalID.java b/src/main/java/com/omertron/themoviedbapi/model/person/ExternalID.java
index 5dbf8cbc7..96df8d0f9 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/ExternalID.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/ExternalID.java
@@ -22,12 +22,15 @@ package com.omertron.themoviedbapi.model.person;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 
 /**
  *
  * @author Stuart
  */
-public class ExternalID extends AbstractJsonMapping implements IIdentification {
+public class ExternalID extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/Person.java b/src/main/java/com/omertron/themoviedbapi/model/person/Person.java
index 30e6dd188..239bf24d6 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/Person.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/Person.java
@@ -20,14 +20,15 @@
 package com.omertron.themoviedbapi.model.person;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author stuart.boston
  */
-public class Person extends PersonBasic {
+public class Person extends PersonBasic implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("adult")
     private boolean adult;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/PersonBasic.java b/src/main/java/com/omertron/themoviedbapi/model/person/PersonBasic.java
index 604341582..76f3ba22f 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/PersonBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/PersonBasic.java
@@ -21,13 +21,15 @@ package com.omertron.themoviedbapi.model.person;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractIdName;
+import java.io.Serializable;
 
 /**
  * @author stuart.boston
  */
-public class PersonBasic extends AbstractIdName {
+public class PersonBasic extends AbstractIdName implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
-    private static final long serialVersionUID = 1L;
     @JsonProperty("profile_path")
     private String profilePath;
 
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/PersonCredits.java b/src/main/java/com/omertron/themoviedbapi/model/person/PersonCredits.java
index 1a152392e..1c9ecb8ad 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/PersonCredits.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/PersonCredits.java
@@ -23,15 +23,16 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author stuart.boston
  * @param <T>
  */
-public class PersonCredits<T extends CreditBasic> extends AbstractJsonMapping implements IIdentification {
+public class PersonCredits<T extends CreditBasic> extends AbstractJsonMapping implements Serializable, IIdentification {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/person/PersonFind.java b/src/main/java/com/omertron/themoviedbapi/model/person/PersonFind.java
index 4bec85203..26a7dea90 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/person/PersonFind.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/person/PersonFind.java
@@ -27,14 +27,16 @@ import com.omertron.themoviedbapi.model.media.MediaBasic;
 import com.omertron.themoviedbapi.model.movie.MovieBasic;
 import com.omertron.themoviedbapi.model.tv.TVBasic;
 import com.omertron.themoviedbapi.model.tv.TVEpisodeBasic;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author stuart.boston
  */
-public class PersonFind extends PersonBasic {
+public class PersonFind extends PersonBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
-    private static final long serialVersionUID = 1L;
     @JsonProperty("adult")
     private Boolean adult;
     @JsonProperty("popularity")
diff --git a/src/main/java/com/omertron/themoviedbapi/model/review/Review.java b/src/main/java/com/omertron/themoviedbapi/model/review/Review.java
index a11986e69..b856ea2dd 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/review/Review.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/review/Review.java
@@ -21,13 +21,14 @@ package com.omertron.themoviedbapi.model.review;
 
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 
 /**
  * @author Stuart
  */
-public class Review extends AbstractJsonMapping {
+public class Review extends AbstractJsonMapping implements Serializable {
 
-    private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private String id;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVBasic.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVBasic.java
index 082c86916..c6d990a8a 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVBasic.java
@@ -22,6 +22,7 @@ package com.omertron.themoviedbapi.model.tv;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.enumeration.MediaType;
 import com.omertron.themoviedbapi.model.media.MediaBasic;
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -29,7 +30,9 @@ import java.util.List;
  *
  * @author stuart.boston
  */
-public class TVBasic extends MediaBasic {
+public class TVBasic extends MediaBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("name")
     private String name;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVCredit.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVCredit.java
index fdaf30430..e99d71ba4 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVCredit.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVCredit.java
@@ -21,6 +21,7 @@ package com.omertron.themoviedbapi.model.tv;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.AbstractIdName;
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -28,7 +29,9 @@ import java.util.List;
  *
  * @author stuart.boston
  */
-public class TVCredit extends AbstractIdName {
+public class TVCredit extends AbstractIdName implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("original_name")
     private String originalName;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeBasic.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeBasic.java
index bcdd337d8..4f4bcc87e 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeBasic.java
@@ -22,13 +22,16 @@ package com.omertron.themoviedbapi.model.tv;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.enumeration.MediaType;
 import com.omertron.themoviedbapi.model.media.MediaBasic;
+import java.io.Serializable;
 
 /**
  * TV Favorite information
  *
  * @author stuart.boston
  */
-public class TVEpisodeBasic extends MediaBasic {
+public class TVEpisodeBasic extends MediaBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("air_date")
     private String airDate;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeInfo.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeInfo.java
index 91fb96ce2..8d45e597f 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVEpisodeInfo.java
@@ -22,6 +22,7 @@ package com.omertron.themoviedbapi.model.tv;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.model.media.MediaCreditCast;
 import com.omertron.themoviedbapi.model.media.MediaCreditCrew;
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -29,7 +30,9 @@ import java.util.List;
  *
  * @author stuart.boston
  */
-public class TVEpisodeInfo extends TVEpisodeBasic {
+public class TVEpisodeInfo extends TVEpisodeBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("crew")
     private List<MediaCreditCrew> crew;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVInfo.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVInfo.java
index afe694173..f4caa0c79 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVInfo.java
@@ -24,13 +24,16 @@ import com.omertron.themoviedbapi.model.Genre;
 import com.omertron.themoviedbapi.model.movie.ProductionCompany;
 import com.omertron.themoviedbapi.model.network.Network;
 import com.omertron.themoviedbapi.model.person.PersonBasic;
+import java.io.Serializable;
 import java.util.List;
 
 /**
  *
  * @author Stuart
  */
-public class TVInfo extends TVBasic {
+public class TVInfo extends TVBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("created_by")
     private List<PersonBasic> createdBy;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonBasic.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonBasic.java
index 28b7e06fd..421b701be 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonBasic.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonBasic.java
@@ -22,13 +22,16 @@ package com.omertron.themoviedbapi.model.tv;
 import com.omertron.themoviedbapi.model.AbstractJsonMapping;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.omertron.themoviedbapi.interfaces.IIdentification;
+import java.io.Serializable;
 
 /**
  * TV Favorite information
  *
  * @author stuart.boston
  */
-public class TVSeasonBasic extends AbstractJsonMapping implements IIdentification {
+public class TVSeasonBasic extends AbstractJsonMapping implements Serializable, IIdentification {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("id")
     private int id = -1;
diff --git a/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonInfo.java b/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonInfo.java
index 9da7cd5fc..666202bec 100644
--- a/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonInfo.java
+++ b/src/main/java/com/omertron/themoviedbapi/model/tv/TVSeasonInfo.java
@@ -20,6 +20,7 @@
 package com.omertron.themoviedbapi.model.tv;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -27,7 +28,9 @@ import java.util.List;
  *
  * @author stuart.boston
  */
-public class TVSeasonInfo extends TVSeasonBasic {
+public class TVSeasonInfo extends TVSeasonBasic implements Serializable {
+
+    private static final long serialVersionUID = 4L;
 
     @JsonProperty("name")
     private String name;