diff --git a/Gemfile b/Gemfile
index 94612e6..2f37ce7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ end
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.4'
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.12'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index cf6df45..a271051 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     crass (1.0.3)
+    database_cleaner (1.7.0)
     devise (4.4.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -100,7 +101,7 @@ GEM
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
     orm_adapter (0.5.0)
-    puma (3.11.2)
+    puma (3.12.2)
     rack (2.0.3)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
@@ -209,6 +210,7 @@ PLATFORMS
 DEPENDENCIES
   byebug
   coffee-rails (~> 4.2)
+  database_cleaner
   devise
   dotenv-rails
   factory_bot_rails
@@ -216,7 +218,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
   mysql2 (< 0.5)
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.4)
   rails-assets-bootstrap!
   rails-assets-jquery!