diff --git a/Dockerfile b/Dockerfile
index 790fc1e..1fb60a6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,12 +3,8 @@ RUN ruby --version
 RUN apt-get update && \
     apt-get install cmake -y
 WORKDIR /tmp
-RUN gem install docopt 
-RUN gem install rugged
 
-RUN git clone https://github.com/Praqma/PlusBump.git -b rebirth .
-RUN gem build plusbump.gemspec
-RUN gem install plusbump-2.0.pre.alpha.gem
+RUN gem install plusbump --pre
 
 RUN mkdir -p /repo
 WORKDIR /repo