diff --git a/Dockerfile b/Dockerfile
index 0c41c1f..e970a84 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,3 +52,5 @@ RUN git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ru
 RUN echo 'eval "$(rbenv init -)"' > ~/.bashrc
 RUN rbenv install $RUBY_VERSION
 RUN rbenv global $RUBY_VERSION
+
+RUN sudo apt-get clean