diff --git a/Gemfile b/Gemfile
index 9ce2757..f29ca5f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '6.1.4'
 # Use Puma as the app server
-gem 'puma', '~> 5.4'
+gem 'puma', '~> 5.5'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3', '~> 1.4.1'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 669f65a..807b0a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,7 +140,7 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     mysql2 (0.5.3)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
@@ -166,7 +166,7 @@ GEM
     orm_adapter (0.5.0)
     popper_js (2.9.2)
     public_suffix (4.0.6)
-    puma (5.4.0)
+    puma (5.5.0)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -282,7 +282,7 @@ DEPENDENCIES
   omniauth
   omniauth-github
   omniauth-rails_csrf_protection
-  puma (~> 5.4)
+  puma (~> 5.5)
   rails (= 6.1.4)
   rails-controller-testing
   rails-i18n (~> 6.0.0)