diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 55c28c7..3dc59c6 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -21,7 +21,8 @@ on:
       - '**/*.gitignore'
       - .editorconfig
       - docs/**
-  pull_request: null
+  pull_request:
+      branches: ["main"]
 jobs:
   build:
     strategy: