diff --git a/Gemfile b/Gemfile
index e5b69f0b6f..d3e7859cee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -34,5 +34,5 @@ end
 # `bundle config set --local without rdoc`
 # Then re-run `bundle install`.
 group :rdoc do
-  gem "rdoc", "6.11.0" unless RUBY_PLATFORM == "java" || ENV["CI"]
+  gem "rdoc", "6.12.0" unless RUBY_PLATFORM == "java" || ENV["CI"]
 end