diff --git a/Gemfile b/Gemfile
index 19836555..977da42c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -77,7 +77,7 @@ gem 'haml-rails'
 # Create secure password
 gem 'bcrypt', '3.1.11'
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 4.3'
 # 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 ad1e82ee..1a058127 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -274,7 +274,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-pjax (1.1.0)
@@ -492,7 +493,7 @@ DEPENDENCIES
   omniauth-google-oauth2
   pry-byebug
   pry-rails
-  puma (~> 3.0)
+  puma (~> 4.3)
   rails (~> 6.0)
   rails-i18n
   rails_12factor