diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 5bee17f..c3769c7 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -1,6 +1,6 @@
 name: macOS CI
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 1302287..526c0bf 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -1,6 +1,6 @@
 name: Ubuntu 20.04 CI
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build: