diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index ec489b5c..5d96891a 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -28,7 +28,7 @@ jobs:
         uses: docker/setup-qemu-action@v4
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       # No push on PRs — build-only validation. GITHUB_TOKEN is enough for GHCR.
       - name: Log in to GHCR