diff --git a/Dockerfile b/Dockerfile
index 3b1159406350c52d66790f5ee063985998dd589a..473d9ce999d9358941a85a1ad6c94d243e3ab5d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ MAINTAINER Erik Hedenström <erik@codemate.se>
 
 # Install and configure Exim
 RUN \
-  apt-get -y install exim4-daemon-light && \
+  apt-fast -y install exim4-daemon-light && \
   sed -i -e "s/dc_eximconfig_configtype='local'/dc_eximconfig_configtype='internet'/" /etc/exim4/update-exim4.conf.conf && \
   sed -i -e "s/127.0.0.1/0.0.0.0/" /etc/exim4/update-exim4.conf.conf && \
   update-exim4.conf
@@ -17,8 +17,8 @@ RUN \
 RUN \
   echo "deb http://pkg.jenkins-ci.org/debian binary/" > /etc/apt/sources.list.d/jenkins.list && \
   curl http://pkg.jenkins-ci.org/debian/jenkins-ci.org.key | apt-key add - && \
-  apt-get update && \
-  apt-get -y install jenkins
+  apt-fast update && \
+  apt-fast -y install jenkins
 
 # Add startup script and SSH config
 ADD ssh /etc/ssh/jenkins