diff --git a/tatort/Dockerfile b/tatort/Dockerfile
index f74d325..9d4297f 100644
--- a/tatort/Dockerfile
+++ b/tatort/Dockerfile
@@ -1,5 +1,5 @@
 # --- Build stage ---
-FROM node:19 as build
+FROM node:19 AS build
 ENV NODE_ENV=production
 ENV ORIGIN=https://tatort.innovation-hub-niedersachsen.de
 WORKDIR /app