diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c729b7d5..666d4f9b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,8 @@
 name: CI
 
-on: [push]
+on:
+  pull_request:
+    types: [opened, synchronize]
 
 jobs:
   test: