diff --git a/Dockerfile b/Dockerfile
index 4ece5e8..aa66170 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM scratch
 
 LABEL maintainer="username"
diff --git a/Dockerfile.complex b/Dockerfile.complex
index d2c6b11..c0b5cf7 100644
--- a/Dockerfile.complex
+++ b/Dockerfile.complex
@@ -1,5 +1,7 @@
+# syntax=docker/dockerfile:1
+
 ## Buildstage ##
-FROM ghcr.io/linuxserver/baseimage-alpine:3.15 as buildstage
+FROM ghcr.io/linuxserver/baseimage-alpine:3.17 as buildstage
 
 RUN \
   echo "**** install packages ****" && \