diff --git a/Dockerfiles/build-mysql/ubuntu/Dockerfile b/Dockerfiles/build-mysql/ubuntu/Dockerfile
index dc0d6b67..044e52f9 100644
--- a/Dockerfiles/build-mysql/ubuntu/Dockerfile
+++ b/Dockerfiles/build-mysql/ubuntu/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1.6
 ARG MAJOR_VERSION=7.4
 ARG ZBX_VERSION=${MAJOR_VERSION}.11
 ARG BUILD_BASE_IMAGE=zabbix-build-base:ubuntu-${ZBX_VERSION}
diff --git a/Dockerfiles/web-apache-pgsql/centos/Dockerfile b/Dockerfiles/web-apache-pgsql/centos/Dockerfile
index 8e2db181..034bdfd4 100644
--- a/Dockerfiles/web-apache-pgsql/centos/Dockerfile
+++ b/Dockerfiles/web-apache-pgsql/centos/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1.6
 ARG OS_BASE_IMAGE=quay.io/centos/centos:stream10-minimal
 ARG MAJOR_VERSION=7.4
 ARG ZBX_VERSION=${MAJOR_VERSION}.11