diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f07e79..32e35d7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,13 @@
 name: Rust
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   build: