diff --git a/Gemfile b/Gemfile
index 9013b5e..b45728a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ end
 # DEFAULT RAILS GEMS
 gem 'rails',                    '~> 5.1.6'
 gem 'mysql2',                   '~> 0.3'
-gem 'puma',                     '~> 3.1'            # Use Puma as the app server
+gem 'puma',                     '~> 4.3'            # Use Puma as the app server
 gem 'rack', 										'>= 2.0.6'
 # gem 'sass-rails',               '~> 5.0'            # Use SCSS for stylesheets
 gem 'uglifier',                 '>= 1.3.0'          # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 404c44e..e3ce356 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,7 +119,8 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    puma (3.12.0)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -190,7 +191,7 @@ DEPENDENCIES
   omniauth-google-oauth2 (~> 0.5)
   pry
   pry-rails
-  puma (~> 3.1)
+  puma (~> 4.3)
   rack (>= 2.0.6)
   rails (~> 5.1.6)
   redcarpet (~> 3.3.4)