diff --git a/backend/src/graphql/types/type/Post.gql b/backend/src/graphql/types/type/Post.gql
index b30aaa938..919eb64a4 100644
--- a/backend/src/graphql/types/type/Post.gql
+++ b/backend/src/graphql/types/type/Post.gql
@@ -1,6 +1,7 @@
 input _CategoryFilter {
   AND: [_CategoryFilter!]
   OR: [_CategoryFilter!]
+  id_in: [ID!]
 }
 input _PostFilter {
   AND: [_PostFilter!]