diff --git a/Gemfile b/Gemfile
index 383b493..7a8f578 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'rails', '~> 6.1.3', '>= 6.1.3.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '~> 1.1'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.5'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 6'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 4869ce6..5abff51 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,12 +107,14 @@ GEM
     mini_mime (1.0.3)
     minitest (5.14.4)
     msgpack (1.4.4)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.6-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.11.6-x86_64-linux)
+      racc (~> 1.4)
     pg (1.2.3)
     public_suffix (4.0.6)
-    puma (5.3.2)
+    puma (5.5.1)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -188,6 +190,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)
@@ -196,7 +199,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (~> 3.3)
   pg (~> 1.1)
-  puma (~> 5.0)
+  puma (~> 5.5)
   rack-cors
   rails (~> 6.1.3, >= 6.1.3.1)
   sass-rails (~> 6)