diff --git a/Gemfile b/Gemfile
index bef0776..94662f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ end
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.3'
 # 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 8b7025c..a89c433 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -196,7 +196,7 @@ GEM
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
     public_suffix (3.0.0)
-    puma (3.10.0)
+    puma (3.12.3)
     rack (2.0.3)
     rack-protection (2.0.0)
       rack
@@ -335,7 +335,7 @@ DEPENDENCIES
   paperclip (~> 5.0.0)
   pg
   poltergeist
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.3)
   redis (~> 3.3)
   ruby-mp3info