diff --git a/Gemfile b/Gemfile
index a279020..019e1ee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ ruby '2.6.3'
 
 gem 'rails', '~> 6.0.0'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 gem 'bootsnap', '>= 1.4.2', require: false
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 78220af..ab55e76 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,8 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.1)
+    puma (4.3.11)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -175,7 +176,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 6.0.0)
   rspec-rails
   spring