diff --git a/jekyll/Dockerfile b/jekyll/Dockerfile
index ea27d23..c53b6af 100644
--- a/jekyll/Dockerfile
+++ b/jekyll/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:jessie
+FROM debian:wheezy
 MAINTAINER Johannes Schickling "schickling.j@gmail.com"
 
 ENV DEBIAN_FRONTEND noninteractive
@@ -9,4 +9,4 @@ RUN chmod +x install.sh && ./install.sh && rm install.sh
 EXPOSE 4000
 VOLUME ["/source"]
 WORKDIR /source
-CMD ["jekyll", "serve"]
+CMD ["jekyll", "serve", "--host=0.0.0.0"]
diff --git a/jekyll/install.sh b/jekyll/install.sh
index ebd073c..0e0509d 100644
--- a/jekyll/install.sh
+++ b/jekyll/install.sh
@@ -3,11 +3,11 @@
 # exit if a command fails
 set -e
 
-# install ruby 2.1
+# install ruby 1.9.1
 apt-get update && apt-get install -y ruby ruby-dev build-essential
 
-# install jekyll & bundler (therubyracer needed for coffeescript support)
-gem install jekyll bundler therubyracer --no-ri --no-rdoc
+# install jekyll & bundler (therubyracer needed for coffeescript support, rouge for highlightning)
+gem install jekyll bundler therubyracer rouge --no-ri --no-rdoc
 
 # cleanup package manager
 apt-get remove --purge -y build-essential ruby-dev && apt-get autoclean && apt-get clean