diff --git a/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/ChapterMutation.kt b/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/ChapterMutation.kt
index 9e75b86e4..808f41881 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/ChapterMutation.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/ChapterMutation.kt
@@ -28,7 +28,7 @@ class ChapterMutation {
         val chapter: ChapterType
     )
     data class UpdateChapterInput(
-        val clientMutationId: String?,
+        val clientMutationId: String? = null,
         val id: Int,
         val patch: UpdateChapterPatch
     )
@@ -38,7 +38,7 @@ class ChapterMutation {
         val chapters: List<ChapterType>
     )
     data class UpdateChaptersInput(
-        val clientMutationId: String?,
+        val clientMutationId: String? = null,
         val ids: List<Int>,
         val patch: UpdateChapterPatch
     )
diff --git a/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/MangaMutation.kt b/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/MangaMutation.kt
new file mode 100644
index 000000000..86612e149
--- /dev/null
+++ b/server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/MangaMutation.kt
@@ -0,0 +1,84 @@
+package suwayomi.tachidesk.graphql.mutations
+
+import com.expediagroup.graphql.server.extensions.getValueFromDataLoader
+import com.expediagroup.graphql.server.extensions.getValuesFromDataLoader
+import graphql.schema.DataFetchingEnvironment
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.jetbrains.exposed.sql.update
+import suwayomi.tachidesk.graphql.types.MangaType
+import suwayomi.tachidesk.manga.model.table.MangaTable
+import java.util.concurrent.CompletableFuture
+
+/**
+ * TODO Mutations
+ * - Add to category
+ * - Remove from category
+ * - Check for updates
+ * - Download x(all = -1) chapters
+ * - Delete read/all downloaded chapters
+ * - Add/update meta
+ * - Delete meta
+ */
+class MangaMutation {
+    data class UpdateMangaPatch(
+        val inLibrary: Boolean? = null
+    )
+
+    data class UpdateMangaPayload(
+        val clientMutationId: String?,
+        val manga: MangaType
+    )
+    data class UpdateMangaInput(
+        val clientMutationId: String? = null,
+        val id: Int,
+        val patch: UpdateMangaPatch
+    )
+
+    data class UpdateMangasPayload(
+        val clientMutationId: String?,
+        val mangas: List<MangaType>
+    )
+    data class UpdateMangasInput(
+        val clientMutationId: String?? = null,
+        val ids: List<Int>,
+        val patch: UpdateMangaPatch
+    )
+
+    private fun updateMangas(ids: List<Int>, patch: UpdateMangaPatch) {
+        transaction {
+            if (patch.inLibrary != null) {
+                MangaTable.update({ MangaTable.id inList ids }) { update ->
+                    patch.inLibrary.also {
+                        update[inLibrary] = it
+                    }
+                }
+            }
+        }
+    }
+
+    fun updateManga(dataFetchingEnvironment: DataFetchingEnvironment, input: UpdateMangaInput): CompletableFuture<UpdateMangaPayload> {
+        val (clientMutationId, id, patch) = input
+
+        updateMangas(listOf(id), patch)
+
+        return dataFetchingEnvironment.getValueFromDataLoader<Int, MangaType>("MangaDataLoader", id).thenApply { manga ->
+            UpdateMangaPayload(
+                clientMutationId = clientMutationId,
+                manga = manga
+            )
+        }
+    }
+
+    fun updateMangas(dataFetchingEnvironment: DataFetchingEnvironment, input: UpdateMangasInput): CompletableFuture<UpdateMangasPayload> {
+        val (clientMutationId, ids, patch) = input
+
+        updateMangas(ids, patch)
+
+        return dataFetchingEnvironment.getValuesFromDataLoader<Int, MangaType>("MangaDataLoader", ids).thenApply { mangas ->
+            UpdateMangasPayload(
+                clientMutationId = clientMutationId,
+                mangas = mangas
+            )
+        }
+    }
+}
diff --git a/server/src/main/kotlin/suwayomi/tachidesk/graphql/queries/MangaQuery.kt b/server/src/main/kotlin/suwayomi/tachidesk/graphql/queries/MangaQuery.kt
index b8375037b..b8bf61405 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/graphql/queries/MangaQuery.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/graphql/queries/MangaQuery.kt
@@ -45,17 +45,6 @@ import java.util.concurrent.CompletableFuture
 
 /**
  * TODO Queries
- *
- * TODO Mutations
- * - Favorite
- * - Unfavorite
- * - Add to category
- * - Remove from category
- * - Check for updates
- * - Download x(all = -1) chapters
- * - Delete read/all downloaded chapters
- * - Add/update meta
- * - Delete meta
  */
 class MangaQuery {
     fun manga(dataFetchingEnvironment: DataFetchingEnvironment, id: Int): CompletableFuture<MangaType?> {
diff --git a/server/src/main/kotlin/suwayomi/tachidesk/graphql/server/TachideskGraphQLSchema.kt b/server/src/main/kotlin/suwayomi/tachidesk/graphql/server/TachideskGraphQLSchema.kt
index dbefa8513..b8e1cb3eb 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/graphql/server/TachideskGraphQLSchema.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/graphql/server/TachideskGraphQLSchema.kt
@@ -13,6 +13,7 @@ import com.expediagroup.graphql.generator.hooks.FlowSubscriptionSchemaGeneratorH
 import com.expediagroup.graphql.generator.toSchema
 import graphql.schema.GraphQLType
 import suwayomi.tachidesk.graphql.mutations.ChapterMutation
+import suwayomi.tachidesk.graphql.mutations.MangaMutation
 import suwayomi.tachidesk.graphql.queries.CategoryQuery
 import suwayomi.tachidesk.graphql.queries.ChapterQuery
 import suwayomi.tachidesk.graphql.queries.ExtensionQuery
@@ -49,7 +50,8 @@ val schema = toSchema(
         TopLevelObject(MetaQuery())
     ),
     mutations = listOf(
-        TopLevelObject(ChapterMutation())
+        TopLevelObject(ChapterMutation()),
+        TopLevelObject(MangaMutation())
     ),
     subscriptions = listOf(
         TopLevelObject(DownloadSubscription())