diff --git a/Gemfile b/Gemfile
index 8d693ca8..1b21da2a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ end
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.0.2'
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 755c077b..4556019e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -192,7 +192,7 @@ GEM
       attr_required (>= 0.0.5)
       rest-client
     pg (0.20.0)
-    puma (3.8.2)
+    puma (3.12.3)
     rack (2.0.3)
     rack-protection (2.0.0)
       rack
@@ -326,7 +326,7 @@ DEPENDENCIES
   paperclip
   paypal-express
   pg
-  puma (~> 3.0)
+  puma (~> 3.12)
   rails (~> 5.0.2)
   recaptcha
   redis (~> 3.0)