diff --git a/Dockerfile b/Dockerfile
index d71aa0b..d4178c7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM archlinux/base:latest
 RUN pacman -Sy && pacman --noconfirm -S awk git tmux zsh fish ruby procps go make
-RUN gem install --no-ri --no-rdoc minitest
+RUN gem install --no-document minitest
 RUN echo '. /usr/share/bash-completion/completions/git' >> ~/.bashrc
 RUN echo '. ~/.bashrc' >> ~/.bash_profile