diff --git a/Gemfile b/Gemfile
index 5a03bc5..c14b669 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.6.5'
 
 gem 'rails', '5.2.3'
-gem 'puma', '~> 3.12.2'
+gem 'puma', '~> 5.6.8'
 gem 'pg', '>= 0.18', '< 2.0'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'