diff --git a/Dockerfile b/Dockerfile
index 0b88b49a8..ab29e79b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,6 +56,7 @@ COPY Gemfile* package.json yarn.lock /opt/mastodon/
 RUN cd /opt/mastodon && \
   bundle config set deployment 'true' && \
   bundle config set without 'development test' && \
+  bundle config set silence_root_warning true && \
 	bundle install -j"$(nproc)" && \
 	yarn install --pure-lockfile