diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0e769f3..53ffcb3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,6 +2,10 @@ name: Main
 
 on: [push]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   run-ci:
     env: