diff --git a/Dockerfile b/Dockerfile
index 06424b2..bb446e2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,17 @@
 FROM ubuntu:trusty
 MAINTAINER paimpozhil@gmail.com
-RUN apt-get update -y
+
 ENV DEBIAN_FRONTEND noninteractive
-RUN apt-get install -y git x11vnc wget python python-numpy unzip Xvfb firefox openbox geany menu
-RUN cd /root && git clone https://github.com/kanaka/noVNC.git 
+
 ADD startup.sh /startup.sh
-RUN chmod 0755 /startup.sh
+
+RUN apt-get update -y && \
+    apt-get install -y git x11vnc wget python python-numpy unzip Xvfb firefox openbox geany menu && \
+    cd /root && git clone https://github.com/kanaka/noVNC.git && \
+    chmod 0755 /startup.sh && \
+    apt-get autoclean && \
+    apt-get autoremove && \
+    rm -rf /var/lib/apt/lists/*
+
 CMD /startup.sh
 EXPOSE 6080