diff --git a/README.md b/README.md
index fb0ec6b..13663cd 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    concurrency: build-${{ github.ref_name }}
     outputs:
       tag: ${{ steps.build-image.outputs.tag }}
       tags: ${{ steps.build-image.outputs.tags }}