diff --git a/Gemfile b/Gemfile
index eabae88..89584d7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 5.2.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # 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 20d7d74..0075381 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     orm_adapter (0.5.0)
-    puma (3.12.0)
+    puma (3.12.6)
     pundit (2.0.0)
       activesupport (>= 3.0.0)
     rack (2.0.5)
@@ -191,7 +191,7 @@ DEPENDENCIES
   kaminari
   listen (>= 3.0.5, < 3.2)
   mini_magick
-  puma (~> 3.11)
+  puma (~> 3.12)
   pundit
   rails (~> 5.2.1)
   sass-rails (~> 5.0)