diff --git a/Gemfile b/Gemfile
index 02e75a6..25e7958 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.1', '>= 5.2.1.1'
 # 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 a29c4ee..9010738 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -156,7 +156,7 @@ GEM
       omniauth (~> 1.9)
     orm_adapter (0.5.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.6)
     rack (2.0.6)
     rack-proxy (0.6.5)
       rack
@@ -272,7 +272,7 @@ DEPENDENCIES
   mocha
   omniauth-facebook
   omniauth-google
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.1, >= 5.2.1.1)
   react-rails
   sass-rails (~> 5.0)