diff --git a/Dockerfile b/Dockerfile
index 1c521d8..d55f7c5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 FROM alpine:latest
 
-LABEL maintainer "https://github.com/hermsi1337"
+LABEL maintainer="https://github.com/hermsi1337"
 
 ENV ROOT_PASSWORD root
 
-RUN apk --update add openssh \
+RUN apk upgrade && apk add --no-cache openssh \
 		&& sed -i s/#PermitRootLogin.*/PermitRootLogin\ yes/ /etc/ssh/sshd_config \
 		&& echo "root:${ROOT_PASSWORD}" | chpasswd \
 		&& rm -rf /var/cache/apk/* /tmp/*