diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 5f49df3..82548dd 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -141,7 +141,7 @@ jobs:
         images: harbor.stfc.ac.uk/datagateway/scigateway-auth
 
     - name: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' && 'Build and push Docker image to Harbor' || 'Build Docker image' }}
-      uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 # v4.0.0
+      uses: docker/build-push-action@0a97817b6ade9f46837855d676c4cca3a2471fc9 # v4.2.1
       with:
         context: .
         push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}