diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2023fd3..02308a2 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -27,22 +27,11 @@ MAINTAINER Ricardo Martins <rasm@oceanscan-mst.com>
 ENV DEBIAN_FRONTEND noninteractive
 
 # Update distro.
-RUN echo "deb http://ftp.us.debian.org/debian testing non-free contrib" >> /etc/apt/sources.list
-RUN echo "deb http://mirrors.fe.up.pt/ubuntu xenial main restricted universe multiverse" >> /etc/apt/sources.list
-RUN echo "deb http://mirrors.fe.up.pt/ubuntu xenial-updates main restricted universe multiverse" >> /etc/apt/sources.list
-RUN echo "deb http://mirrors.fe.up.pt/ubuntu xenial-backports main restricted universe multiverse" >> /etc/apt/sources.list
-RUN apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 3B4FE6ACC0B21F32
 RUN apt-get update -y
 RUN apt-get dist-upgrade -y
-RUN apt-get install -y g++-5
-RUN apt-get install -y gcc-5
 RUN apt-get install -y wget
 RUN apt-get install -y bzip2
 RUN apt-get install -y git
 RUN apt-get install -y g++-multilib
+RUN apt-get install -y cmake
 RUN apt-get install -y file
-RUN apt-get install -y vim
-RUN apt-get install -y nasm
-RUN apt-get install -y build-essential
-RUN apt-get install -y make
-RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/g++ g++ /usr/bin/g++-5