diff --git a/.github/workflows/openapi.yml b/.github/workflows/openapi.yml
index 90365bebf98a92..9363e5eee4a7bb 100644
--- a/.github/workflows/openapi.yml
+++ b/.github/workflows/openapi.yml
@@ -1,8 +1,6 @@
 name: openapi
 on:
-  push:
-    branches:
-      - master
+  pull_request:
 
 # hack for https://github.com/actions/cache/issues/810#issuecomment-1222550359
 env: