diff --git a/src/API/Kitsu/Transformer/MangaTransformer.php b/src/API/Kitsu/Transformer/MangaTransformer.php
index 6e9e35e1..fd235df5 100644
--- a/src/API/Kitsu/Transformer/MangaTransformer.php
+++ b/src/API/Kitsu/Transformer/MangaTransformer.php
@@ -35,9 +35,12 @@ final class MangaTransformer extends AbstractTransformer {
 	{
 		$genres = [];
 
-		foreach($included['categories'] as $cat)
+		foreach($item['included'] as $included)
 		{
-			$genres[] = $cat['title'];
+			if ($included['type'] === 'categories')
+			{
+				$genres[] = $included['attributes']['title'];
+			}
 		}
 
 		sort($genres);
diff --git a/tests/test_data/Kitsu/animeListItemBeforeTransform.json b/tests/test_data/Kitsu/animeListItemBeforeTransform.json
index 242d0405..223ce859 100644
--- a/tests/test_data/Kitsu/animeListItemBeforeTransform.json
+++ b/tests/test_data/Kitsu/animeListItemBeforeTransform.json
@@ -115,19 +115,19 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "11": {
-                            "name": "Fantasy",
+                            "title": "Fantasy",
                             "slug": "fantasy",
                             "description": ""
                         },
                         "16": {
-                            "name": "Slice of Life",
+                            "title": "Slice of Life",
                             "slug": "slice-of-life",
                             "description": ""
                         }
@@ -189,24 +189,24 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "8": {
-                            "name": "Magic",
+                            "title": "Magic",
                             "slug": "magic",
                             "description": null
                         },
                         "40": {
-                            "name": "Kids",
+                            "title": "Kids",
                             "slug": "kids",
                             "description": null
                         },
                         "47": {
-                            "name": "Mahou Shoujo",
+                            "title": "Mahou Shoujo",
                             "slug": "mahou-shoujo",
                             "description": "Magical Girls"
                         },
                         "11": {
-                            "name": "Fantasy",
+                            "title": "Fantasy",
                             "slug": "fantasy",
                             "description": ""
                         }
@@ -265,9 +265,9 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "35": {
-                            "name": "Music",
+                            "title": "Music",
                             "slug": "music",
                             "description": null
                         }
@@ -325,19 +325,19 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "24": {
-                            "name": "School",
+                            "title": "School",
                             "slug": "school",
                             "description": null
                         }
@@ -399,29 +399,29 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "2": {
-                            "name": "Adventure",
+                            "title": "Adventure",
                             "slug": "adventure",
                             "description": null
                         },
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "8": {
-                            "name": "Magic",
+                            "title": "Magic",
                             "slug": "magic",
                             "description": null
                         },
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "11": {
-                            "name": "Fantasy",
+                            "title": "Fantasy",
                             "slug": "fantasy",
                             "description": ""
                         }
@@ -479,14 +479,14 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "16": {
-                            "name": "Slice of Life",
+                            "title": "Slice of Life",
                             "slug": "slice-of-life",
                             "description": ""
                         }
@@ -547,24 +547,24 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "24": {
-                            "name": "School",
+                            "title": "School",
                             "slug": "school",
                             "description": null
                         },
                         "34": {
-                            "name": "Harem",
+                            "title": "Harem",
                             "slug": "harem",
                             "description": null
                         },
                         "14": {
-                            "name": "Romance",
+                            "title": "Romance",
                             "slug": "romance",
                             "description": ""
                         }
@@ -619,19 +619,19 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "24": {
-                            "name": "School",
+                            "title": "School",
                             "slug": "school",
                             "description": null
                         }
@@ -689,24 +689,24 @@
                 "showType": "special",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "8": {
-                            "name": "Magic",
+                            "title": "Magic",
                             "slug": "magic",
                             "description": null
                         },
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "11": {
-                            "name": "Fantasy",
+                            "title": "Fantasy",
                             "slug": "fantasy",
                             "description": ""
                         },
                         "1": {
-                            "name": "Action",
+                            "title": "Action",
                             "slug": "action",
                             "description": ""
                         }
@@ -764,14 +764,14 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         },
                         "35": {
-                            "name": "Music",
+                            "title": "Music",
                             "slug": "music",
                             "description": null
                         }
@@ -829,29 +829,29 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "8": {
-                            "name": "Magic",
+                            "title": "Magic",
                             "slug": "magic",
                             "description": null
                         },
                         "27": {
-                            "name": "Historical",
+                            "title": "Historical",
                             "slug": "historical",
                             "description": null
                         },
                         "28": {
-                            "name": "Military",
+                            "title": "Military",
                             "slug": "military",
                             "description": null
                         },
                         "4": {
-                            "name": "Drama",
+                            "title": "Drama",
                             "slug": "drama",
                             "description": ""
                         },
                         "1": {
-                            "name": "Action",
+                            "title": "Action",
                             "slug": "action",
                             "description": ""
                         }
@@ -913,9 +913,9 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "3": {
-                            "name": "Comedy",
+                            "title": "Comedy",
                             "slug": "comedy",
                             "description": null
                         }
@@ -977,24 +977,24 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "7": {
-                            "name": "Mystery",
+                            "title": "Mystery",
                             "slug": "mystery",
                             "description": null
                         },
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "4": {
-                            "name": "Drama",
+                            "title": "Drama",
                             "slug": "drama",
                             "description": ""
                         },
                         "1": {
-                            "name": "Action",
+                            "title": "Action",
                             "slug": "action",
                             "description": ""
                         }
@@ -1056,29 +1056,29 @@
                 "showType": "TV",
                 "nsfw": false,
                 "relationships": {
-                    "genres": {
+                    "categories": {
                         "9": {
-                            "name": "Supernatural",
+                            "title": "Supernatural",
                             "slug": "supernatural",
                             "description": null
                         },
                         "21": {
-                            "name": "Thriller",
+                            "title": "Thriller",
                             "slug": "thriller",
                             "description": null
                         },
                         "47": {
-                            "name": "Mahou Shoujo",
+                            "title": "Mahou Shoujo",
                             "slug": "mahou-shoujo",
                             "description": "Magical Girls"
                         },
                         "11": {
-                            "name": "Fantasy",
+                            "title": "Fantasy",
                             "slug": "fantasy",
                             "description": ""
                         },
                         "1": {
-                            "name": "Action",
+                            "title": "Action",
                             "slug": "action",
                             "description": ""
                         }
diff --git a/tests/test_data/Kitsu/mangaListBeforeTransform.json b/tests/test_data/Kitsu/mangaListBeforeTransform.json
index 67a4af8e..585921e5 100644
--- a/tests/test_data/Kitsu/mangaListBeforeTransform.json
+++ b/tests/test_data/Kitsu/mangaListBeforeTransform.json
@@ -419,30 +419,30 @@
         "mangaType": "manga"
       },
       "relationships": {
-        "genres": {
+        "categories": {
           "links": {
-            "self": "https://kitsu.io/api/edge/manga/20286/relationships/genres",
-            "related": "https://kitsu.io/api/edge/manga/20286/genres"
+            "self": "https://kitsu.io/api/edge/manga/20286/relationships/categories",
+            "related": "https://kitsu.io/api/edge/manga/20286/categories"
           },
           "data": [
             {
-              "type": "genres",
+              "type": "categories",
               "id": "3"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "21"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "24"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "16"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "14"
             }
           ]
@@ -554,30 +554,30 @@
         "mangaType": "manga"
       },
       "relationships": {
-        "genres": {
+        "categories": {
           "links": {
-            "self": "https://kitsu.io/api/edge/manga/47/relationships/genres",
-            "related": "https://kitsu.io/api/edge/manga/47/genres"
+            "self": "https://kitsu.io/api/edge/manga/47/relationships/categories",
+            "related": "https://kitsu.io/api/edge/manga/47/categories"
           },
           "data": [
             {
-              "type": "genres",
+              "type": "categories",
               "id": "3"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "13"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "34"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "14"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "25"
             }
           ]
@@ -689,38 +689,38 @@
         "mangaType": "manga"
       },
       "relationships": {
-        "genres": {
+        "categories": {
           "links": {
-            "self": "https://kitsu.io/api/edge/manga/11777/relationships/genres",
-            "related": "https://kitsu.io/api/edge/manga/11777/genres"
+            "self": "https://kitsu.io/api/edge/manga/11777/relationships/categories",
+            "related": "https://kitsu.io/api/edge/manga/11777/categories"
           },
           "data": [
             {
-              "type": "genres",
+              "type": "categories",
               "id": "3"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "9"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "13"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "24"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "45"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "14"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "25"
             }
           ]
@@ -832,22 +832,22 @@
         "mangaType": "manga"
       },
       "relationships": {
-        "genres": {
+        "categories": {
           "links": {
-            "self": "https://kitsu.io/api/edge/manga/27175/relationships/genres",
-            "related": "https://kitsu.io/api/edge/manga/27175/genres"
+            "self": "https://kitsu.io/api/edge/manga/27175/relationships/categories",
+            "related": "https://kitsu.io/api/edge/manga/27175/categories"
           },
           "data": [
             {
-              "type": "genres",
+              "type": "categories",
               "id": "24"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "16"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "14"
             }
           ]
@@ -954,22 +954,22 @@
         "mangaType": "manga"
       },
       "relationships": {
-        "genres": {
+        "categories": {
           "links": {
-            "self": "https://kitsu.io/api/edge/manga/25491/relationships/genres",
-            "related": "https://kitsu.io/api/edge/manga/25491/genres"
+            "self": "https://kitsu.io/api/edge/manga/25491/relationships/categories",
+            "related": "https://kitsu.io/api/edge/manga/25491/categories"
           },
           "data": [
             {
-              "type": "genres",
+              "type": "categories",
               "id": "3"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "24"
             },
             {
-              "type": "genres",
+              "type": "categories",
               "id": "16"
             }
           ]
@@ -1026,120 +1026,120 @@
     },
     {
       "id": "3",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/3"
+        "self": "https://kitsu.io/api/edge/categories/3"
       },
       "attributes": {
-        "name": "Comedy",
+        "title": "Comedy",
         "slug": "comedy",
         "description": null
       }
     },
     {
       "id": "21",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/21"
+        "self": "https://kitsu.io/api/edge/categories/21"
       },
       "attributes": {
-        "name": "Thriller",
+        "title": "Thriller",
         "slug": "thriller",
         "description": null
       }
     },
     {
       "id": "24",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/24"
+        "self": "https://kitsu.io/api/edge/categories/24"
       },
       "attributes": {
-        "name": "School",
+        "title": "School",
         "slug": "school",
         "description": null
       }
     },
     {
       "id": "16",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/16"
+        "self": "https://kitsu.io/api/edge/categories/16"
       },
       "attributes": {
-        "name": "Slice of Life",
+        "title": "Slice of Life",
         "slug": "slice-of-life",
         "description": ""
       }
     },
     {
       "id": "14",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/14"
+        "self": "https://kitsu.io/api/edge/categories/14"
       },
       "attributes": {
-        "name": "Romance",
+        "title": "Romance",
         "slug": "romance",
         "description": ""
       }
     },
     {
       "id": "13",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/13"
+        "self": "https://kitsu.io/api/edge/categories/13"
       },
       "attributes": {
-        "name": "Sports",
+        "title": "Sports",
         "slug": "sports",
         "description": null
       }
     },
     {
       "id": "34",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/34"
+        "self": "https://kitsu.io/api/edge/categories/34"
       },
       "attributes": {
-        "name": "Harem",
+        "title": "Harem",
         "slug": "harem",
         "description": null
       }
     },
     {
       "id": "25",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/25"
+        "self": "https://kitsu.io/api/edge/categories/25"
       },
       "attributes": {
-        "name": "Ecchi",
+        "title": "Ecchi",
         "slug": "ecchi",
         "description": ""
       }
     },
     {
       "id": "9",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/9"
+        "self": "https://kitsu.io/api/edge/categories/9"
       },
       "attributes": {
-        "name": "Supernatural",
+        "title": "Supernatural",
         "slug": "supernatural",
         "description": null
       }
     },
     {
       "id": "45",
-      "type": "genres",
+      "type": "categories",
       "links": {
-        "self": "https://kitsu.io/api/edge/genres/45"
+        "self": "https://kitsu.io/api/edge/categories/45"
       },
       "attributes": {
-        "name": "Gender Bender",
+        "title": "Gender Bender",
         "slug": "gender-bender",
         "description": ""
       }
@@ -1244,7 +1244,7 @@
     "count": 5
   },
   "links": {
-    "first": "https://kitsu.io/api/edge/library-entries?fields%5Busers%5D=id&filter%5Bmedia_type%5D=Manga&filter%5Bstatus%5D=1&filter%5Buser_id%5D=2644&include=media%2Cmedia.genres%2Cmedia.mappings&page%5Blimit%5D=200&page%5Boffset%5D=0&sort=-updated_at",
-    "last": "https://kitsu.io/api/edge/library-entries?fields%5Busers%5D=id&filter%5Bmedia_type%5D=Manga&filter%5Bstatus%5D=1&filter%5Buser_id%5D=2644&include=media%2Cmedia.genres%2Cmedia.mappings&page%5Blimit%5D=200&page%5Boffset%5D=0&sort=-updated_at"
+    "first": "https://kitsu.io/api/edge/library-entries?fields%5Busers%5D=id&filter%5Bmedia_type%5D=Manga&filter%5Bstatus%5D=1&filter%5Buser_id%5D=2644&include=media%2Cmedia.categories%2Cmedia.mappings&page%5Blimit%5D=200&page%5Boffset%5D=0&sort=-updated_at",
+    "last": "https://kitsu.io/api/edge/library-entries?fields%5Busers%5D=id&filter%5Bmedia_type%5D=Manga&filter%5Bstatus%5D=1&filter%5Buser_id%5D=2644&include=media%2Cmedia.categories%2Cmedia.mappings&page%5Blimit%5D=200&page%5Boffset%5D=0&sort=-updated_at"
   }
 }
\ No newline at end of file