diff --git a/Gemfile b/Gemfile
index bb1e21b..f74f140 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.4.2'
 # Use mysql as the database for Active Record
 gem 'mysql2', '>= 0.4.4', '< 0.6.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 90f7284..89536d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,11 +78,11 @@ GEM
     capistrano-rbenv (2.2.0)
       capistrano (~> 3.1)
       sshkit (~> 1.3)
-    capistrano3-puma (3.1.1)
+    capistrano3-puma (5.2.0)
       capistrano (~> 3.7)
       capistrano-bundler
-      puma (~> 3.4)
-    concurrent-ruby (1.1.8)
+      puma (>= 4.0, < 6.0)
+    concurrent-ruby (1.1.9)
     crass (1.0.6)
     docsplit (0.7.6)
     domain_name (0.5.20190701)
@@ -106,7 +106,7 @@ GEM
     httparty (0.18.1)
       mime-types (~> 3.0)
       multi_xml (>= 0.5.2)
-    i18n (1.8.9)
+    i18n (1.9.1)
       concurrent-ruby (~> 1.0)
     jbuilder (2.11.2)
       activesupport (>= 5.0.0)
@@ -185,7 +185,8 @@ GEM
       oauth2 (~> 1.4)
       omniauth (>= 1.9, < 3)
     orm_adapter (0.5.0)
-    puma (3.12.6)
+    puma (5.6.2)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-protection (2.1.0)
@@ -216,7 +217,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
-    rake (13.0.3)
+    rake (13.0.6)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -316,7 +317,7 @@ DEPENDENCIES
   mysql2 (>= 0.4.4, < 0.6.0)
   nokogiri
   omniauth-google-oauth2
-  puma (~> 3.12)
+  puma (~> 5.6)
   rails (~> 5.2.4.2)
   recaptcha
   rubyzip