diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 2a2eaf2..b8ea444 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -6,7 +6,7 @@ on:
       - actions
   pull_request:
     branches:
-      - main
+      - 5.x
 
 jobs:
   install-dependencies: