diff --git a/Dockerfile b/Dockerfile
index 75f657f..b6fc01b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile-upstream:master-labs
 # refs:
 #   https://docs.docker.com/develop/develop-images/build_enhancements/#overriding-default-frontends
 #   https://pythonspeed.com/articles/docker-buildkit/