diff --git a/Dockerfile b/Dockerfile
index e122c9c..ee7d022 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.4
+# syntax = docker/dockerfile:1.19
 # https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/reference.md
 FROM codercom/code-server:4.11.0 AS code-server