diff --git a/Gemfile b/Gemfile
index d41de9b..3ae5b1a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ end
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.7'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+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 c86012c..aa290fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     popper_js (1.14.5)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -242,7 +242,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   mongoid (~> 6.0)
   mongoid-rspec
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.7)
   rspec-rails
   sass-rails (~> 5.0)