diff --git a/Gemfile b/Gemfile
index cb73385..5ac4f5f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem 'rails', '~> 5.1.3'
 # Use postgresql as the database for Active Record
 gem 'pg', '~> 0.18'
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use fontawesome for common icons
diff --git a/Gemfile.lock b/Gemfile.lock
index c335c27..391ec11 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -306,7 +306,8 @@ GEM
       activerecord (>= 3.0)
     powerpack (0.1.1)
     public_suffix (3.0.0)
-    puma (3.10.0)
+    puma (5.6.7)
+      nio4r (~> 2.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
     rack (2.0.3)
@@ -564,7 +565,7 @@ DEPENDENCIES
   metamagic
   newrelic_rpm
   pg (~> 0.18)
-  puma (~> 3.0)
+  puma (~> 5.6)
   pundit
   rack-attack
   rack-cors (~> 1.0.2)