diff --git a/api/s5/swagger.yaml b/api/s5/swagger.yaml
index db2b09a..0fa78d1 100644
--- a/api/s5/swagger.yaml
+++ b/api/s5/swagger.yaml
@@ -909,6 +909,9 @@ components:
                         $ref: '#/components/schemas/AccountPin'
         AccountPin:
             type: object
+            required:
+                - hash
+                - mime_type
             properties:
                 hash:
                     type: string