diff --git a/packages/api/src/resolvers/types.ts b/packages/api/src/resolvers/types.ts
index 21b049bae..b296acd4b 100644
--- a/packages/api/src/resolvers/types.ts
+++ b/packages/api/src/resolvers/types.ts
@@ -55,8 +55,8 @@ export interface RequestContext {
     highlights: DataLoader<string, Highlight[]>
     recommendations: DataLoader<string, Recommendation[]>
     uploadFiles: DataLoader<string, UploadFile | undefined>
-    libraryItems: DataLoader<string, LibraryItem>
-    publicItems: DataLoader<string, PublicItem>
+    libraryItems: DataLoader<string, LibraryItem | undefined>
+    publicItems: DataLoader<string, PublicItem | undefined>
     subscriptions: DataLoader<string, Subscription>
   }
 }
diff --git a/packages/api/src/services/library_item.ts b/packages/api/src/services/library_item.ts
index d242c9f31..93e24ac3d 100644
--- a/packages/api/src/services/library_item.ts
+++ b/packages/api/src/services/library_item.ts
@@ -160,7 +160,7 @@ export const batchGetLibraryItems = async (ids: readonly string[]) => {
     ],
   })
 
-  return ids.map((id) => items.find((item) => item.id === id) || null)
+  return ids.map((id) => items.find((item) => item.id === id) || undefined)
 }
 
 export const getItemUrl = (id: string) => `${env.client.url}/me/${id}`