diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index ed3ecff..a4e1fbe 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -3,10 +3,10 @@ name: CI
 on:
   push:
     branches:
-      - main
+      - master
     pull_requuest:
       branches:
-        - main
+        - master
 
 jobs:
   check: