diff --git a/Gemfile b/Gemfile
index 0ae4be7..135a13a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem 'kaminari'
 gem 'money-rails'
 gem 'paper_trail'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 gem 'rails', '~> 5.2.3'
 gem 'redis'
 gem 'rgeo-geojson'
diff --git a/Gemfile.lock b/Gemfile.lock
index 4b7f912..e960036 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -203,7 +203,8 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.13.0)
     public_suffix (4.0.5)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -332,7 +333,7 @@ DEPENDENCIES
   paper_trail
   pg (>= 0.18, < 2.0)
   pry-byebug
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 5.2.3)
   redis
   rgeo-geojson