diff --git a/.github/workflows/sync-openapi.yml b/.github/workflows/sync-openapi.yml
index fda313da70..ee347de378 100644
--- a/.github/workflows/sync-openapi.yml
+++ b/.github/workflows/sync-openapi.yml
@@ -48,6 +48,7 @@ jobs:
           # will be checked out
           repository: github/models-gateway
           path: models-gateway
+          ref: main
 
       - uses: ./.github/actions/node-npm-setup