diff --git a/.github/workflows/firmware.yml b/.github/workflows/firmware.yml
index c3a3f1a..18a2999 100644
--- a/.github/workflows/firmware.yml
+++ b/.github/workflows/firmware.yml
@@ -16,6 +16,10 @@ on:
       - 'contrib/sign.sh'
       - 'contrib/actions/update-modules.sh'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}-${{ github.event.pull_request.number || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   generate_target_matrix:
     runs-on: ubuntu-latest