diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1eb8ab8..40e1345 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,6 +4,10 @@ on:
   push:
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     name: PHP ${{matrix.php}}, ${{ matrix.os }}, ${{ matrix.stability }}