diff --git a/Gemfile b/Gemfile
index c93addb..99390af 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ ruby '2.6.1'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.2.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index c277f97..a60a967 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,8 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.2)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (2.0.5)
     rack-cors (1.0.2)
     rack-test (1.0.0)
@@ -182,7 +183,7 @@ DEPENDENCIES
   pg (~> 1.0)
   playoverwatch-scraper (~> 0.1.1)
   pry (~> 0.11.3)
-  puma (~> 3.12)
+  puma (~> 4.3)
   rack-cors
   rails (~> 5.2.0)
   rspec-rails (~> 3.5)