diff --git a/Dockerfile b/Dockerfile
index 81967406..d4523f5b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -37,7 +37,7 @@ ENV BUNDLE_GEM_GROUPS ${RAILS_ENV}
 COPY Gemfile ${DEPS_HOME}/Gemfile
 COPY Gemfile.lock ${DEPS_HOME}/Gemfile.lock
 
-RUN gem update --system 3.3.5
+RUN gem update --system 3.5.1
 RUN gem install bundler -v 2.3.5
 RUN bundle config set frozen "true"
 RUN bundle config set no-cache "true"