diff --git a/Dockerfile b/Dockerfile
index f0c089b..d2004e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ WORKDIR /app
 COPY metrics.json metrics-lua.json /app/
 
 # Runtime Image
-FROM alpine:3.15
+FROM alpine:3.15 as runtime-image
 
 ARG REPO=sberk42/fritzbox_exporter