diff --git a/Gemfile b/Gemfile
index cdc469c..e763132 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 77faa42..230c7de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -157,7 +157,7 @@ GEM
     msgpack (1.3.3)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     nokogiri (1.13.10)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
@@ -197,7 +197,7 @@ GEM
       rubocop (~> 0.50, >= 0.49.1)
     psych (3.1.0)
     public_suffix (4.0.6)
-    puma (4.3.12)
+    puma (5.6.7)
       nio4r (~> 2.0)
     pundit (2.1.0)
       activesupport (>= 3.0.0)
@@ -377,7 +377,7 @@ DEPENDENCIES
   pronto-rails_best_practices
   pronto-reek
   pronto-rubocop
-  puma (~> 4.3)
+  puma (~> 5.6)
   pundit
   rails (~> 6.0.2, >= 6.0.2.2)
   rspec-rails (~> 4.0.0)