diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d51c4f67b..fc2445e0f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,8 +1,12 @@
 name: CI
-on:
+=on:
   push:
+    branches:
+      - "master"
+  pull_request:
     branches:
       - "**"
+    types: [opened, synchronize]
 
 concurrency:
   group: build-${{ github.event.pull_request.number || github.ref }}