diff --git a/signal-server-openapi.yaml b/signal-server-openapi.yaml
index 1d3d5ca30..1294de40d 100644
--- a/signal-server-openapi.yaml
+++ b/signal-server-openapi.yaml
@@ -2749,6 +2749,10 @@ paths:
         required: true
         schema:
           type: string
+      - name: User-Agent
+        in: header
+        schema:
+          type: string
       responses:
         default:
           description: default response
@@ -2788,6 +2792,10 @@ paths:
         in: query
         schema:
           type: string
+      - name: User-Agent
+        in: header
+        schema:
+          type: string
       responses:
         default:
           description: default response