diff --git a/base/Dockerfile b/base/Dockerfile
index 8de3801..fe115e7 100644
--- a/base/Dockerfile
+++ b/base/Dockerfile
@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.2
+# syntax = docker/dockerfile:1
 FROM alpine:edge
 USER root
 
diff --git a/basei3/Dockerfile b/basei3/Dockerfile
index 535417a..14caa03 100644
--- a/basei3/Dockerfile
+++ b/basei3/Dockerfile
@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.2
+# syntax = docker/dockerfile:1
 FROM alpine/base
 USER root
 
diff --git a/firefox/Dockerfile b/firefox/Dockerfile
index 98d5d01..04d87fa 100644
--- a/firefox/Dockerfile
+++ b/firefox/Dockerfile
@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.2
+# syntax = docker/dockerfile:1
 FROM alpine/base:i3
 USER root
 
diff --git a/remmina/Dockerfile b/remmina/Dockerfile
index 5999d87..6cd84aa 100644
--- a/remmina/Dockerfile
+++ b/remmina/Dockerfile
@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.2
+# syntax = docker/dockerfile:1
 FROM alpine/base:i3
 USER root