diff --git a/Dockerfile b/Dockerfile
index 2e012ed..2ceacdc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@ RUN gcc -o deployment deployment.c
 
 # Finales Image: Nur die Binary mitnehmen
 FROM alpine:3.21
+RUN apk update && apk upgrade --no-cache
 
 # Neuer User wegen Sicherheit
 RUN adduser -D appuser