diff --git a/Gemfile b/Gemfile
index 45266bb..f56ed37 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.4.4'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
@@ -82,7 +82,7 @@ group :development do
   # Deployment tool
   gem 'capistrano', '~> 3.11', require: false
   gem 'capistrano-rails', '~> 1.4', require: false
-  gem 'capistrano3-puma', '~> 3.1.1', require: false
+  gem 'capistrano3-puma', '~> 5.2.0', require: false
   gem 'capistrano-rvm', require: false
   gem 'capistrano-rake', require: false
   gem 'capistrano-yarn', '~> 2.0', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index d10c3b3..8b8562b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,10 +90,10 @@ GEM
       sshkit (~> 1.2)
     capistrano-yarn (2.0.2)
       capistrano (~> 3.0)
-    capistrano3-puma (3.1.1)
+    capistrano3-puma (5.2.0)
       capistrano (~> 3.7)
       capistrano-bundler
-      puma (~> 3.4)
+      puma (>= 4.0, < 6.0)
     capybara (3.35.3)
       addressable
       mini_mime (>= 0.1.3)
@@ -111,7 +111,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.1.10)
     coveralls (0.8.23)
       json (>= 1.8, < 3)
       simplecov (~> 0.16.1)
@@ -141,7 +141,7 @@ GEM
     httparty (0.16.4)
       mime-types (~> 3.0)
       multi_xml (>= 0.5.2)
-    i18n (1.8.10)
+    i18n (1.10.0)
       concurrent-ruby (~> 1.0)
     icalendar (2.7.1)
       ice_cube (~> 0.16)
@@ -205,7 +205,8 @@ GEM
       racc (~> 1.4)
     pg (1.2.3)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (5.6.4)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -347,7 +348,7 @@ DEPENDENCIES
   capistrano-rake
   capistrano-rvm
   capistrano-yarn (~> 2.0)
-  capistrano3-puma (~> 3.1.1)
+  capistrano3-puma (~> 5.2.0)
   capybara (>= 2.15, < 4.0)
   coffee-rails (~> 4.2)
   coveralls
@@ -362,7 +363,7 @@ DEPENDENCIES
   mimemagic (= 0.3.10)
   mini_magick (~> 4.10.1)
   pg (>= 0.18, < 2.0)
-  puma (~> 3.11)
+  puma (~> 5.6)
   rails (~> 5.2.4.4)
   redis (~> 4.0)
   rspec-rails (~> 3.8)