diff --git a/.github/workflows/CI_mac.yml b/.github/workflows/CI_mac.yml
index fab20425c..aa5064030 100644
--- a/.github/workflows/CI_mac.yml
+++ b/.github/workflows/CI_mac.yml
@@ -10,7 +10,7 @@ on:
       - 'v*.*.*'
   pull_request:
     branches:
-      - 'master'
+      - '*'
     paths:
       - '**'