diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d8397b..4ff98c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
       uses: docker/build-push-action@v3
       with:
         file: ./manylinux2014_x86_64/Dockerfile
-        push: ${{ github.event_name == 'push' }}
+        push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         tags: ghcr.io/libertem/manylinux2014_x86_64:latest
 
   linux-aarch64:
@@ -39,5 +39,5 @@ jobs:
       with:
         file: ./manylinux2014_aarch64/Dockerfile
         platforms: linux/arm64
-        push: ${{ github.event_name == 'push' }}
+        push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         tags: ghcr.io/libertem/manylinux2014_aarch64:latest