diff --git a/Dockerfile b/Dockerfile
index 84d4ad1..a05dec7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,20 @@
 FROM debian:buster
 
-#Install dependencies
-RUN apt-get update
-RUN apt-get install wget ca-certificates -y
+  
+RUN apt-get update && \
+  #Install dependencies
+  apt-get install -y \
+  wget \
+  ca-certificates \
+  && rm -rf /var/lib/apt/lists/* && \
+  
+  #Add repository
+  echo "deb http://download.proxmox.com/debian/pbs buster pbstest" > /etc/apt/sources.list.d/pbstest-beta.list && \
+  wget http://download.proxmox.com/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg && \
 
-#Add repository
-RUN echo "deb http://download.proxmox.com/debian/pbs buster pbstest" > /etc/apt/sources.list.d/pbstest-beta.list
-RUN wget http://download.proxmox.com/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg
-
-#Install packages
-RUN apt-get update
-RUN apt-get install -y proxmox-backup-server=0.9.6-1
+  #Install packages
+  apt-get update && \
+  apt-get install -y proxmox-backup-server=0.9.6-1
 
 #Activate backup user
 RUN chsh -s /bin/bash backup