diff --git a/Gemfile b/Gemfile
index 0df36f6..aac4375 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.3'
 # Use mysql as the database for Active Record
 gem 'mysql2', '0.4.10'
 # 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 495b171..c38c69d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -130,7 +130,7 @@ GEM
       rails
     popper_js (1.14.5)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -273,7 +273,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   mysql2 (= 0.4.10)
   octicons_helper
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.3)
   rspec-rails
   sass-rails (~> 5.0)