diff --git a/Gemfile b/Gemfile
index bb7a668..493202b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ gem 'rails', '~> 6.0.2.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '~> 0.18'
 # Use Puma as the app server
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index a20b00f..a44b235 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1086,7 +1086,8 @@ GEM
     pg_search (2.3.2)
       activerecord (>= 5.2)
       activesupport (>= 5.2)
-    puma (3.12.6)
+    puma (4.3.11)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -1212,7 +1213,7 @@ DEPENDENCIES
   paperclip (= 5.2.1)
   pg (~> 0.18)
   pg_search
-  puma (~> 3.12)
+  puma (~> 4.3)
   rack-cors
   rack-throttle
   rails (~> 6.0.2.1)