diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 3428d6d..729eff9 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,7 +1,7 @@
 FROM nicbet/phoenix:1.6.11
 
 RUN apt-get install -y ruby \
-  && gem install --no-ri --no-rdoc htmlbeautifier -v 1.3.1 \
+  && gem install --no-document htmlbeautifier -v 1.3.1 \
   && npm i -g yarn \
   && apt-get autoremove -y \
   && apt-get clean -y \