diff --git a/images/basic/ruby/Dockerfile b/images/basic/ruby/Dockerfile
index b63f575b5..c59a3cb83 100644
--- a/images/basic/ruby/Dockerfile
+++ b/images/basic/ruby/Dockerfile
@@ -1 +1 @@
-FROM ruby:3.2.3
+FROM ruby:3.3.5
diff --git a/test/image/ruby.sh b/test/image/ruby.sh
index 364d1bd55..fba40c152 100755
--- a/test/image/ruby.sh
+++ b/test/image/ruby.sh
@@ -16,5 +16,5 @@
 
 set -e
 
-gem install sinatra rackup
+gem install sinatra rackup puma
 ruby /src/ruby.rb