diff --git a/Dockerfile b/Dockerfile
index e004cbb..eebd014 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,22 +1,16 @@
-FROM ubuntu:14.04
+FROM ubuntu:14.10
 
 ENV DEBIAN_FRONTEND noninteractive
 RUN locale-gen en_GB en_GB.UTF-8 && dpkg-reconfigure locales
 
-RUN apt-get update
-
 # Prerequisites
-# install self-signed ssl certs
-RUN apt-get install -y --force-yes ssl-cert
-
-# Install postfix as MTA
-RUN apt-get install -y --force-yes postfix
-
-# Install dovecot as IMAP server
-RUN apt-get install -y --force-yes dovecot-imapd
-
-# Install OpenDKIM domain signing server
-RUN apt-get install -y --force-yes opendkim
+RUN apt-get update && apt-get install -y \
+    ssl-cert \
+    postfix \
+    dovecot-imapd \
+    opendkim && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 # postfix configuration
 ADD ./config/postfix.main.cf /etc/postfix/main.cf
@@ -49,4 +43,3 @@ EXPOSE 25 143 587
 
 # start necessary services for operation (dovecot -F starts dovecot in the foreground to prevent container exit)
 ENTRYPOINT /process_settings; service rsyslog start; service opendkim start; service postfix start; dovecot -F
-
diff --git a/Makefile b/Makefile
index 5cbe5fe..4ea4cca 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ all: build
 .PHONY: build
 
 build:
-	docker build -t dockermail_made_special:2.1.7 .
+	docker build -t dockermail_made_special:2.11.1 .
 
 run:
-	docker run --name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special:2.1.7
+	docker run --name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special:2.11.1
diff --git a/README.md b/README.md
index 985698d..a200f91 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,6 @@ Use the the example config files in `config/example` of this repo.
 	 a directory on your host. (This is recommended, otherwise
 	 you have to remember to backup your mail when you want to restart the container)
 
-	 `docker run -name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special/2.1.7`
+	 `docker run -name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special/2.11.1
 
-8. Enjoy!
\ No newline at end of file
+8. Enjoy!