diff --git a/public/openapi/write/posts/pid/diffs/timestamp.yaml b/public/openapi/write/posts/pid/diffs/timestamp.yaml
index 15d942fc26..02d4219d9c 100644
--- a/public/openapi/write/posts/pid/diffs/timestamp.yaml
+++ b/public/openapi/write/posts/pid/diffs/timestamp.yaml
@@ -19,7 +19,9 @@ delete:
       description: a valid UNIX timestamp
       example: 1611850000000
   responses:
-    '200':
+    "200":
       description: Post diff successfully deleted
       content:
-        $ref: ../diffs.yaml#/get/responses/200/content
\ No newline at end of file
+        application/json:
+          schema:
+            $ref: ../diffs.yaml#/get/responses/200/content