diff --git a/Gemfile b/Gemfile
index 1d17e4c..5931141 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ gem 'jquery-rails'
 gem 'omniauth-facebook'
 gem 'omniauth-rails_csrf_protection'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 gem 'rails', '~> 5.2.3'
 gem 'sass-rails', '~> 5.0' # Use Uglifier as compressor for JavaScript assets
 gem 'turbolinks', '~> 5'
diff --git a/Gemfile.lock b/Gemfile.lock
index d5aaa9f..9428118 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -196,7 +196,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.4)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.2.6.2)
     rack-protection (3.0.5)
       rack
@@ -358,7 +359,7 @@ DEPENDENCIES
   pg (>= 0.18, < 2.0)
   pry-byebug
   pry-rails
-  puma (~> 3.12)
+  puma (~> 4.3)
   rails (~> 5.2.3)
   rails-controller-testing
   rspec-activemodel-mocks