diff --git a/Gemfile b/Gemfile
index 1e268c1..f0bd198 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,7 +27,7 @@ gem 'sequenced'
 # gem 'bcrypt', '~> 3.1.7'
 
 # Use Puma as the app server
-gem 'puma'
+gem 'puma', '>= 5.6.9'
 
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
diff --git a/Gemfile.lock b/Gemfile.lock
index 30b1f4f..c0bcfe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -203,7 +203,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (3.0.3)
-    puma (3.12.2)
+    puma (6.4.3)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
@@ -350,7 +351,7 @@ DEPENDENCIES
   pg
   poltergeist
   pry-rails
-  puma
+  puma (>= 5.6.9)
   rails
   rails_admin
   rest-client