diff --git a/Gemfile b/Gemfile
index 5be7319..2edb5d0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.5.3'
 
 gem 'rails', '~> 5.2.2'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 gem 'responders'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 579852d..6caf210 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -125,7 +125,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.3)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -248,7 +248,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   postgresql
   pry
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.2)
   rails-controller-testing
   rb-readline