diff --git a/Gemfile b/Gemfile
index d7ac4ee..9dea2ec 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ ruby '2.6.3'
 
 gem 'rails', '~> 5.2.3'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 74050ca..9369c1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -202,7 +202,8 @@ GEM
     pg (1.3.4)
     popper_js (1.16.0)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
     rack-cors (1.1.1)
@@ -334,7 +335,7 @@ DEPENDENCIES
   mini_magick
   parallel
   pg (>= 0.18, < 2.0)
-  puma (~> 3.11)
+  puma (~> 4.3)
   rack-cors
   rails (~> 5.2.3)
   rails-assets-OwlCarousel2!