diff --git a/Gemfile b/Gemfile
index 462d75f..abc6630 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '~> 6.1.1'
 gem "sqlite3", "~> 1.4", group: [:development, :test]
 gem "pg",      group:  :production
 # 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 de628fc..88cd563 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -154,7 +154,7 @@ GEM
     mini_portile2 (2.5.0)
     minitest (5.14.3)
     msgpack (1.3.3)
-    nio4r (2.5.4)
+    nio4r (2.5.8)
     nokogiri (1.11.1)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -174,7 +174,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
-    puma (5.1.1)
+    puma (5.5.1)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -311,7 +311,7 @@ DEPENDENCIES
   pg
   premailer-rails (~> 1.11)
   pry-rails
-  puma (~> 5.0)
+  puma (~> 5.5)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.1)
   rspec-rails (~> 4.0.0)