diff --git a/Gemfile b/Gemfile
index 26385c9..97ae606 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.2', '>= 5.2.2.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # 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 45e7574..1979561 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -149,7 +149,7 @@ GEM
     pg (1.1.4)
     pg (1.1.4-x64-mingw32)
     public_suffix (3.0.3)
-    puma (3.12.1)
+    puma (3.12.3)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -269,7 +269,7 @@ DEPENDENCIES
   octokit (~> 4.0)
   omniauth-github
   pg (>= 0.18, < 2.0)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.2, >= 5.2.2.1)
   rails-assets-bootstrap!
   rails-assets-jquery!