diff --git a/.github/workflows/scala.yml b/.github/workflows/scala.yml
index 9d2eeda..f82c12d 100644
--- a/.github/workflows/scala.yml
+++ b/.github/workflows/scala.yml
@@ -1,6 +1,10 @@
 name: Scala CI
 
-on: [push]
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
 
 jobs:
   build: