diff --git a/Dockerfile b/Dockerfile
index b2366c50ab4db57207cf1e8d6c4f1000d668bba0..7d961a390734f8a42df0357e51527c7addaac423 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG FLUTTER_VERSION="3.19.0"
 ARG DEPENDENCY_DIR="/tmp/dependencies"
 ARG FLUTTER_URL="https://github.com/flutter/flutter"
 
-FROM $IMAGE_SERVER/ubuntu:22.04 as download
+FROM $IMAGE_SERVER/ubuntu:22.04 AS download
 
 ARG FLUTTER_URL
 ARG FLUTTER_VERSION