diff --git a/Gemfile b/Gemfile
index 1ba3576..c2e547b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem 'geokit', '~> 1.13.1'
 gem 'haml', '~> 5.2.1'
 gem 'hashie', '~> 4.1.0'
 gem 'jquery-rails', '~> 4.4.0'
-gem 'puma', '~> 3.12.6'
+gem 'puma', '~> 5.3.2'
 gem 'rails_admin', '~> 2.1.1'
 gem 'sass-rails', '~> 5.1.0'
 gem 'validates_formatting_of', '~> 0.9.0'
@@ -34,7 +34,7 @@ group :development, :test do
   gem 'capistrano-rbenv', '~> 2.1.3'
   gem 'capistrano-rbenv-install', '~> 1.2.0'
   gem 'capistrano3-nginx', '~> 3.0.1'
-  gem 'capistrano3-puma', '~> 3.1.1'
+  gem 'capistrano3-puma', '~> 5.0.4'
   gem 'dotenv-rails', '~> 2.7.4'
   gem 'faker', '~> 2.17.0'
   gem 'factory_bot_rails', '~> 6.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index af90a08..93daf34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,10 +92,10 @@ GEM
       capistrano-rbenv (>= 2.0)
     capistrano3-nginx (3.0.4)
       capistrano (~> 3.0)
-    capistrano3-puma (3.1.1)
+    capistrano3-puma (5.0.4)
       capistrano (~> 3.7)
       capistrano-bundler
-      puma (~> 3.4)
+      puma (>= 4.0, < 6.0)
     capybara (3.35.3)
       addressable
       mini_mime (>= 0.1.3)
@@ -226,7 +226,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (5.3.2)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-pjax (1.1.0)
@@ -384,7 +385,7 @@ DEPENDENCIES
   capistrano-rbenv (~> 2.1.3)
   capistrano-rbenv-install (~> 1.2.0)
   capistrano3-nginx (~> 3.0.1)
-  capistrano3-puma (~> 3.1.1)
+  capistrano3-puma (~> 5.0.4)
   capybara (~> 3.35.3)
   capybara-slow_finder_errors (= 0.1.5)
   codecov (= 0.5.1)
@@ -403,7 +404,7 @@ DEPENDENCIES
   pg (~> 1.2.3)
   poltergeist (~> 1.18.0)
   pry-rails (~> 0.3.4)
-  puma (~> 3.12.6)
+  puma (~> 5.3.2)
   rails (~> 5.2.5)
   rails-controller-testing (~> 1.0.2)
   rails_12factor (~> 0.0.3)