diff --git a/Gemfile b/Gemfile
index 845fc31..d97b8cc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 5.2.0'
 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'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6392701..83f450f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -156,7 +156,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.4)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -270,7 +270,7 @@ DEPENDENCIES
   guard-livereload (~> 2.5, >= 2.5.2)
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.0)
   sass-rails (~> 5.0)
   selenium-webdriver