diff --git a/Gemfile b/Gemfile
index 6f3dadc..56b2540 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.1.4', '>= 6.1.4.1'
 # Use mysql as the database for Active Record
 gem 'mysql2', '~> 0.5'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.5'
 # 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 31c0601..f94ee6b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -116,9 +116,11 @@ GEM
     nio4r (2.5.8)
     nokogiri (1.12.4-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.12.4-x86_64-linux)
+      racc (~> 1.4)
     orm_adapter (0.5.0)
     public_suffix (4.0.6)
-    puma (5.4.0)
+    puma (5.5.1)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -221,6 +223,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)
@@ -232,7 +235,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (~> 3.3)
   mysql2 (~> 0.5)
-  puma (~> 5.0)
+  puma (~> 5.5)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.4, >= 6.1.4.1)
   sass-rails (>= 6)