diff --git a/.github/actions/build-leg/action.yml b/.github/actions/build-leg/action.yml
index 83b5c9e..2eb9cd8 100644
--- a/.github/actions/build-leg/action.yml
+++ b/.github/actions/build-leg/action.yml
@@ -356,7 +356,7 @@ runs:
     # ~20-min osxcross compile. Loaded as a local tag the run step below consumes.
     - name: Set up buildx (cross-dockerfile legs)
       if: steps.tjs-cache.outputs.cache-hit != 'true' && inputs.cross-dockerfile != ''
-      uses: docker/setup-buildx-action@v3
+      uses: docker/setup-buildx-action@v4
     - name: Build the cross-toolchain image (GHA-cached, no registry)
       if: steps.tjs-cache.outputs.cache-hit != 'true' && inputs.cross-dockerfile != ''
       uses: docker/build-push-action@v6