diff --git a/src/aleph/web/controllers/posts.py b/src/aleph/web/controllers/posts.py
index f6e9782f..773d7f6d 100644
--- a/src/aleph/web/controllers/posts.py
+++ b/src/aleph/web/controllers/posts.py
@@ -37,7 +37,7 @@ class PostQueryParams(BaseModel):
     )
     post_types: Optional[List[str]] = Field(
         default=None,
-        alias="types[]",
+        alias="types",
         description="Accepted values for the 'content.type' field.",
     )
     tags: Optional[List[str]] = Field(