diff --git a/Gemfile b/Gemfile
index 3500b14..a6a78c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -45,7 +45,7 @@ group :development, :test do
   gem 'faker'
   gem 'pry'
   gem 'pry-byebug'
-  gem 'puma', '~> 3.6'
+  gem 'puma', '~> 4.3'
 end
 
 group :development do
diff --git a/Gemfile.lock b/Gemfile.lock
index c8dde6a..76df146 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -913,7 +913,8 @@ GEM
       byebug (~> 10.0)
       pry (~> 0.10)
     public_suffix (4.0.6)
-    puma (3.12.0)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (2.2.3)
     rack-cache (1.8.0)
       rack (>= 0.4)
@@ -1131,7 +1132,7 @@ DEPENDENCIES
   postgresql_cursor
   pry
   pry-byebug
-  puma (~> 3.6)
+  puma (~> 4.3)
   rack-mini-profiler
   rails (~> 5.2)
   rails-controller-testing