diff --git a/graphql-ruby/Gemfile b/graphql-ruby/Gemfile
index e6aeafe8..4f686a22 100644
--- a/graphql-ruby/Gemfile
+++ b/graphql-ruby/Gemfile
@@ -6,4 +6,4 @@ git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 gem "graphql", "2.0.5"
 gem "roda", "3.54.0"
-gem "puma", "5.6.7"
+gem "puma", "6.4.0"