diff --git a/.github/workflows/code_style_fix.yaml b/.github/workflows/code_style_fix.yaml
index c29c4b3..e20d6a9 100644
--- a/.github/workflows/code_style_fix.yaml
+++ b/.github/workflows/code_style_fix.yaml
@@ -1,7 +1,8 @@
 name: Automatic Code Style Fix
 
-on: [pull_request, pull_request_target]
 on:
+  pull_request:
+    branches: [main]
   workflow_call:
     secrets:
       github-token: