diff --git a/auth-server-open-api-spec.yaml b/auth-server-open-api-spec.yaml
index 2bb98dc9..6fc3aca4 100644
--- a/auth-server-open-api-spec.yaml
+++ b/auth-server-open-api-spec.yaml
@@ -418,6 +418,11 @@ paths:
         - grant
       responses:
         '302':
+          content:
+            text/html:
+              schema:
+                type: string
+                nullable: true
           description: Found
           headers:
             Location: