diff --git a/Dockerfile b/Dockerfile
index 8ba82d7..cef36b2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM ghcr.io/linuxserver/baseimage-kasmvnc:debianbookworm
 
 # set version label