diff --git a/Gemfile b/Gemfile
index 0cd4dfb..d5d5358 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '~> 5.2.1'
 gem 'pg', '~> 0.18.4'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+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 bb0722f..25e5c05 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -218,7 +218,7 @@ GEM
       ast (~> 2.2)
     pg (0.18.4)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.2)
     rack (2.0.5)
     rack-proxy (0.6.5)
       rack
@@ -351,7 +351,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   opal_hot_reloader!
   pg (~> 0.18.4)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.1)
   rspec-rails
   sass-rails (~> 5.0)