diff --git a/Dockerfile b/Dockerfile
index a2f62ca..4205c7e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,6 +56,7 @@ COPY --from=build --chown=node:node /app ./
 RUN mkdir -p data && chown node:node data \
     && rm -rf /usr/local/lib/node_modules/npm /usr/local/lib/node_modules/corepack \
        /usr/local/bin/npm /usr/local/bin/npx /usr/local/bin/corepack
-USER node
+# UID 1000 ist der Benutzer "node" des Basis-Images (numerisch, DL3066).
+USER 1000:1000
 EXPOSE 3000 3001
 CMD ["node", "dist/server/index.js"]