diff --git a/admin/Dockerfile b/admin/Dockerfile
index 2acfd09..53112aa 100644
--- a/admin/Dockerfile
+++ b/admin/Dockerfile
@@ -1,5 +1,3 @@
-# syntax=docker/dockerfile:1.7
-
 FROM node:22-alpine AS builder
 ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"
diff --git a/backend/Dockerfile b/backend/Dockerfile
index c192928..4237642 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,5 +1,3 @@
-# syntax=docker/dockerfile:1.7
-
 FROM rust:1.91.1-bookworm AS builder
 WORKDIR /app
 
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index a5ac42b..a18c6fe 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -1,5 +1,3 @@
-# syntax=docker/dockerfile:1.7
-
 FROM node:22-alpine AS builder
 ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"