diff --git a/Gemfile b/Gemfile
index 5ddedab..f34e75e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ ruby '2.6.3'
 
 gem 'rails', '~> 6.0.0'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 gem 'sass-rails', '~> 5'
 gem 'webpacker', '~> 4.0'
 gem 'bootsnap', '>= 1.4.2', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index d672615..645d286 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,8 @@ GEM
       racc (~> 1.4)
     pg (1.1.4)
     public_suffix (4.0.1)
-    puma (3.12.6)
+    puma (4.3.11)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-proxy (0.6.5)
@@ -239,7 +240,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   nokogiri
   pg (>= 0.18, < 2.0)
-  puma (~> 3.12)
+  puma (~> 4.3)
   rails (~> 6.0.0)
   rest-client
   rspec-rails (~> 3.8)