diff --git a/signal-server-openapi.yaml b/signal-server-openapi.yaml
index 256ad13b2..06f542bf9 100644
--- a/signal-server-openapi.yaml
+++ b/signal-server-openapi.yaml
@@ -1378,10 +1378,6 @@ paths:
       - Certificate
       operationId: getGroupAuthenticationCredentials
       parameters:
-      - name: User-Agent
-        in: header
-        schema:
-          type: string
       - name: redemptionStartSeconds
         in: query
         schema: