diff --git a/packages/api/src/entity/post.ts b/packages/api/src/entity/post.ts
index 3e8bf997e..2890a3af9 100644
--- a/packages/api/src/entity/post.ts
+++ b/packages/api/src/entity/post.ts
@@ -19,8 +19,8 @@ export class Post {
   @JoinColumn({ name: 'user_id' })
   user!: User
 
-  @Column('uuid', { array: true, nullable: true })
-  libraryItemIds?: string[] | null
+  @Column('uuid', { array: true })
+  libraryItemIds!: string[]
 
   @Column('uuid', { array: true, nullable: true })
   highlightIds?: string[] | null
diff --git a/packages/api/src/generated/graphql.ts b/packages/api/src/generated/graphql.ts
index 8b4830ad8..7a128adaa 100644
--- a/packages/api/src/generated/graphql.ts
+++ b/packages/api/src/generated/graphql.ts
@@ -521,7 +521,7 @@ export enum CreatePostErrorCode {
 export type CreatePostInput = {
   content: Scalars['String'];
   highlightIds?: InputMaybe<Array<Scalars['ID']>>;
-  libraryItemIds?: InputMaybe<Array<Scalars['ID']>>;
+  libraryItemIds: Array<Scalars['ID']>;
   thought?: InputMaybe<Scalars['String']>;
   thumbnail?: InputMaybe<Scalars['String']>;
   title: Scalars['String'];
@@ -2413,7 +2413,7 @@ export type Post = {
   createdAt: Scalars['Date'];
   highlights?: Maybe<Array<Highlight>>;
   id: Scalars['ID'];
-  libraryItems?: Maybe<Array<Article>>;
+  libraryItems: Array<Article>;
   ownedByViewer: Scalars['Boolean'];
   thought?: Maybe<Scalars['String']>;
   thumbnail?: Maybe<Scalars['String']>;
@@ -7064,7 +7064,7 @@ export type PostResolvers<ContextType = ResolverContext, ParentType extends Reso
   createdAt?: Resolver<ResolversTypes['Date'], ParentType, ContextType>;
   highlights?: Resolver<Maybe<Array<ResolversTypes['Highlight']>>, ParentType, ContextType>;
   id?: Resolver<ResolversTypes['ID'], ParentType, ContextType>;
-  libraryItems?: Resolver<Maybe<Array<ResolversTypes['Article']>>, ParentType, ContextType>;
+  libraryItems?: Resolver<Array<ResolversTypes['Article']>, ParentType, ContextType>;
   ownedByViewer?: Resolver<ResolversTypes['Boolean'], ParentType, ContextType>;
   thought?: Resolver<Maybe<ResolversTypes['String']>, ParentType, ContextType>;
   thumbnail?: Resolver<Maybe<ResolversTypes['String']>, ParentType, ContextType>;
diff --git a/packages/api/src/generated/schema.graphql b/packages/api/src/generated/schema.graphql
index 0e8c2a93d..ca5744364 100644
--- a/packages/api/src/generated/schema.graphql
+++ b/packages/api/src/generated/schema.graphql
@@ -466,7 +466,7 @@ enum CreatePostErrorCode {
 input CreatePostInput {
   content: String!
   highlightIds: [ID!]
-  libraryItemIds: [ID!]
+  libraryItemIds: [ID!]!
   thought: String
   thumbnail: String
   title: String!
@@ -1847,7 +1847,7 @@ type Post {
   createdAt: Date!
   highlights: [Highlight!]
   id: ID!
-  libraryItems: [Article!]
+  libraryItems: [Article!]!
   ownedByViewer: Boolean!
   thought: String
   thumbnail: String
diff --git a/packages/api/src/resolvers/posts/index.ts b/packages/api/src/resolvers/posts/index.ts
index 88704bc0c..38326dc1a 100644
--- a/packages/api/src/resolvers/posts/index.ts
+++ b/packages/api/src/resolvers/posts/index.ts
@@ -125,8 +125,8 @@ export const createPostResolver = authorized<
     userId: uid,
     title,
     content,
+    libraryItemIds,
     highlightIds: highlightIds || undefined,
-    libraryItemIds: libraryItemIds || undefined,
     thought: thought || undefined,
     thumbnail: thumbnail || undefined,
   }
@@ -160,7 +160,7 @@ export const updatePostResolver = authorized<
     thumbnail,
   } = input
 
-  if (!id || title === null || content === null) {
+  if (!id || title === null || content === null || libraryItemIds === null) {
     log.error('Invalid args', { id })
 
     return {
diff --git a/packages/api/src/schema.ts b/packages/api/src/schema.ts
index c36cb13e5..3099e9b03 100755
--- a/packages/api/src/schema.ts
+++ b/packages/api/src/schema.ts
@@ -3347,7 +3347,7 @@ const schema = gql`
     ownedByViewer: Boolean!
     thumbnail: String
     thought: String
-    libraryItems: [Article!]
+    libraryItems: [Article!]!
     highlights: [Highlight!]
     createdAt: Date!
     updatedAt: Date!
@@ -3357,7 +3357,7 @@ const schema = gql`
     title: String! @sanitize(minLength: 1, maxLength: 255)
     content: String! @sanitize(minLength: 1)
     thumbnail: String
-    libraryItemIds: [ID!]
+    libraryItemIds: [ID!]!
     highlightIds: [ID!]
     thought: String
   }
diff --git a/packages/api/test/resolvers/post.test.ts b/packages/api/test/resolvers/post.test.ts
index 99e9e51f6..8d9c8f536 100644
--- a/packages/api/test/resolvers/post.test.ts
+++ b/packages/api/test/resolvers/post.test.ts
@@ -1,5 +1,7 @@
 import { expect } from 'chai'
+import { LibraryItem } from '../../src/entity/library_item'
 import { User } from '../../src/entity/user'
+import { deleteLibraryItemById } from '../../src/services/library_item'
 import {
   createPosts,
   deletePosts,
@@ -7,7 +9,7 @@ import {
 } from '../../src/services/post'
 import { findProfile, updateProfile } from '../../src/services/profile'
 import { deleteUser } from '../../src/services/user'
-import { createTestUser } from '../db'
+import { createTestLibraryItem, createTestUser } from '../db'
 import { generateFakeUuid, graphqlRequest, loginAndGetAuthToken } from '../util'
 
 describe('Post Resolvers', () => {
@@ -53,20 +55,27 @@ describe('Post Resolvers', () => {
     `
 
     let postIds: Array<string> = []
+    let libraryItem: LibraryItem
+    let libraryItem1: LibraryItem
 
     before(async () => {
+      libraryItem = await createTestLibraryItem(loginUser.id)
+      libraryItem1 = await createTestLibraryItem(loginUser.id)
+
       const posts = [
         {
           title: 'Post 1',
           content: 'Content 1',
           user: loginUser,
           createdAt: new Date('2021-01-01'),
+          libraryItemIds: [libraryItem.id],
         },
         {
           title: 'Post 2',
           content: 'Content 2',
           user: loginUser,
           createdAt: new Date('2021-01-02'),
+          libraryItemIds: [libraryItem1.id],
         },
       ]
       const newPosts = await createPosts(loginUser.id, posts)
@@ -76,6 +85,9 @@ describe('Post Resolvers', () => {
 
     after(async () => {
       await deletePosts(loginUser.id, postIds)
+
+      await deleteLibraryItemById(libraryItem.id, loginUser.id)
+      await deleteLibraryItemById(libraryItem1.id, loginUser.id)
     })
 
     it('should return an error if the args are invalid', async () => {
@@ -164,12 +176,16 @@ describe('Post Resolvers', () => {
     `
 
     let postId: string
+    let libraryItem: LibraryItem
 
     before(async () => {
+      libraryItem = await createTestLibraryItem(loginUser.id)
+
       const post = {
         title: 'Post',
         content: 'Content',
         user: loginUser,
+        libraryItemIds: [libraryItem.id],
       }
       const newPost = await createPosts(loginUser.id, [post])
 
@@ -178,6 +194,7 @@ describe('Post Resolvers', () => {
 
     after(async () => {
       await deletePosts(loginUser.id, [postId])
+      await deleteLibraryItemById(libraryItem.id, loginUser.id)
     })
 
     it('should return an error if the args are invalid', async () => {
@@ -266,10 +283,13 @@ describe('Post Resolvers', () => {
     `
 
     it('should create a post', async () => {
+      const libraryItem = await createTestLibraryItem(loginUser.id)
+
       const response = await graphqlRequest(mutation, authToken, {
         input: {
           title: 'Post',
           content: 'Content',
+          libraryItemIds: [libraryItem.id],
         },
       })
 
@@ -286,6 +306,7 @@ describe('Post Resolvers', () => {
       expect(profile?.private).to.be.false
 
       await deletePosts(loginUser.id, [postId])
+      await deleteLibraryItemById(libraryItem.id, loginUser.id)
     })
   })
 
@@ -308,12 +329,16 @@ describe('Post Resolvers', () => {
     `
 
     let postId: string
+    let libraryItem: LibraryItem
 
     before(async () => {
+      libraryItem = await createTestLibraryItem(loginUser.id)
+
       const post = {
         title: 'Post',
         content: 'Content',
         user: loginUser,
+        libraryItemIds: [libraryItem.id],
       }
       const newPost = await createPosts(loginUser.id, [post])
 
@@ -322,6 +347,7 @@ describe('Post Resolvers', () => {
 
     after(async () => {
       await deletePosts(loginUser.id, [postId])
+      await deleteLibraryItemById(libraryItem.id, loginUser.id)
     })
 
     it('should return an error if the args are invalid', async () => {
@@ -399,18 +425,27 @@ describe('Post Resolvers', () => {
     `
 
     let postId: string
+    let libraryItem: LibraryItem
 
     before(async () => {
+      libraryItem = await createTestLibraryItem(loginUser.id)
+
       const post = {
         title: 'Post',
         content: 'Content',
         user: loginUser,
+        libraryItemIds: [libraryItem.id],
       }
       const newPost = await createPosts(loginUser.id, [post])
 
       postId = newPost[0].id
     })
 
+    after(async () => {
+      await deletePosts(loginUser.id, [postId])
+      await deleteLibraryItemById(libraryItem.id, loginUser.id)
+    })
+
     it('should return an error if the args are invalid', async () => {
       const response = await graphqlRequest(mutation, authToken, {
         id: '',
diff --git a/packages/db/migrations/0183.do.post.sql b/packages/db/migrations/0183.do.post.sql
index a5e410761..d8b30ba33 100755
--- a/packages/db/migrations/0183.do.post.sql
+++ b/packages/db/migrations/0183.do.post.sql
@@ -7,7 +7,7 @@ BEGIN;
 CREATE TABLE omnivore.post (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v1mc(),
     user_id UUID NOT NULL REFERENCES omnivore.user(id) ON DELETE CASCADE,
-    library_item_ids UUID[],
+    library_item_ids UUID[] NOT NULL,
 	highlight_ids UUID[],
     title TEXT NOT NULL,
 	content TEXT NOT NULL, -- generated from template