diff --git a/Gemfile b/Gemfile
index 9210d0f..4db00f8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.1.6', '>= 5.1.6.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 5.6', '>= 5.6.7'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
@@ -25,7 +25,7 @@ group :development do
   gem 'capistrano-rvm', require: false
   gem 'capistrano-rails', require: false
   gem 'capistrano-bundler', require: false
-  gem 'capistrano3-puma', require: false
+  gem 'capistrano3-puma', '>= 5.0.0', require: false
 end
 
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
diff --git a/Gemfile.lock b/Gemfile.lock
index fdbe7bc..53483b7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    airbrussh (1.3.0)
+    airbrussh (1.4.2)
       sshkit (>= 1.6.1, != 1.7.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
@@ -81,26 +81,25 @@ GEM
     bcrypt (3.1.12)
     builder (3.2.3)
     byebug (10.0.0)
-    capistrano (3.10.1)
+    capistrano (3.17.3)
       airbrussh (>= 1.0.0)
       i18n
       rake (>= 10.0.0)
       sshkit (>= 1.9.0)
-    capistrano-bundler (1.3.0)
+    capistrano-bundler (1.6.0)
       capistrano (~> 3.1)
-      sshkit (~> 1.2)
     capistrano-rails (1.3.1)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
     capistrano-rvm (0.1.2)
       capistrano (~> 3.0)
       sshkit (~> 1.2)
-    capistrano3-puma (3.1.1)
+    capistrano3-puma (5.2.0)
       capistrano (~> 3.7)
       capistrano-bundler
-      puma (~> 3.4)
+      puma (>= 4.0, < 6.0)
     chunky_png (1.3.10)
-    concurrent-ruby (1.1.3)
+    concurrent-ruby (1.2.2)
     crass (1.0.4)
     devise (4.5.0)
       bcrypt (~> 3.0)
@@ -125,7 +124,7 @@ GEM
     has_scope (0.7.2)
       actionpack (>= 4.1)
       activesupport (>= 4.1)
-    i18n (1.1.1)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     jbuilder (2.7.0)
       activesupport (>= 4.2.0)
@@ -160,9 +159,9 @@ GEM
     mini_portile2 (2.3.0)
     minitest (5.11.3)
     multi_json (1.13.1)
-    net-scp (1.2.1)
-      net-ssh (>= 2.6.5)
-    net-ssh (4.2.0)
+    net-scp (4.0.0)
+      net-ssh (>= 2.6.5, < 8.0.0)
+    net-ssh (7.2.0)
     nio4r (2.3.1)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
@@ -172,7 +171,8 @@ GEM
     pg (1.0.0)
     polyamorous (1.3.3)
       activerecord (>= 3.0)
-    puma (3.11.2)
+    puma (5.6.7)
+      nio4r (~> 2.0)
     rack (2.0.6)
     rack-cors (1.0.2)
     rack-test (1.1.0)
@@ -200,7 +200,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.3.1)
+    rake (13.0.6)
     ransack (1.8.7)
       actionpack (>= 3.0)
       activerecord (>= 3.0)
@@ -238,7 +238,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sshkit (1.16.0)
+    sshkit (1.21.5)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     thor (0.20.3)
@@ -262,7 +262,7 @@ DEPENDENCIES
   capistrano-bundler
   capistrano-rails
   capistrano-rvm
-  capistrano3-puma
+  capistrano3-puma (>= 5.0.0)
   devise (>= 4.4.1)
   draper (>= 3.0.1)
   inherited_resources!
@@ -270,7 +270,7 @@ DEPENDENCIES
   listen (>= 3.1.5, < 3.2)
   oily_png
   pg (>= 0.18, < 2.0)
-  puma (~> 3.7)
+  puma (~> 5.6, >= 5.6.7)
   rack-cors
   rails (~> 5.1.6, >= 5.1.6.1)
   redis (~> 4.0)
@@ -279,4 +279,4 @@ DEPENDENCIES
   tzinfo-data
 
 BUNDLED WITH
-   1.17.1
+   1.17.3