diff --git a/openapi.yaml b/openapi.yaml
index c87a70fd78..576793b6fb 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -75,6 +75,8 @@ paths:
                 uids:
                   type: array
                   description: A collection of uids
+                  items:
+                    type: number
             example:
               uids:
                 - 1