diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index 870b0ee..8834947 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -1,5 +1,7 @@
 name: PHP_CodeSniffer
-on: push
+on:
+  push:
+  pull_request:
 jobs:
   phpcs:
     runs-on: ubuntu-latest