Dockerfile.download in puma-daemon-0.2.2 vs Dockerfile.download in puma-daemon-0.2.3

@@ -11,10 +11,10 @@
 #    
 #    # Run specs in Linux:
 #    $ bundle exec rspec
 #    $ bundle exec puma -C config/puma.rb spec/fixtures/lobster.ru
 #    
-FROM ruby:3.0.0
+FROM ruby:3.1
 
 RUN apt-get update -y && \
     apt-get install -yqq \
     build-essential \
     git