diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 66cac52b10..a58188d734 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -16,6 +16,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: free disk space
+        run: |
+          sudo swapoff -a
+          sudo rm -f /swapfile
+          sudo apt clean
+          docker rmi $(docker image ls -aq)
+          df -h
+
       - name: Build
         uses: docker/build-push-action@v2
         with: