diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index c5cd2735..5078f551 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -18,7 +18,7 @@ on:
         default: true
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.merge_group.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs:
diff --git a/.github/workflows/oxipng.yml b/.github/workflows/oxipng.yml
index 34507d45..9a7d669e 100644
--- a/.github/workflows/oxipng.yml
+++ b/.github/workflows/oxipng.yml
@@ -9,7 +9,7 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.merge_group.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs: