diff --git a/Gemfile b/Gemfile
index d45147b..b7df75f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,7 @@ gem 'rails', '~> 5.1.2'
 # Use postgresql as the database for Active Record
 gem 'pg', '~> 0.18'
 # 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 8430d91..4c6d137 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    puma (3.10.0)
+    puma (3.12.6)
     rack (2.0.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
@@ -202,7 +202,7 @@ DEPENDENCIES
   pry
   pry-byebug
   pry-rails
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.2)
   rails-controller-testing
   rspec-rails