diff --git a/Gemfile b/Gemfile
index 5bdcd00..39db09a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ ruby '2.6.1'
 gem 'rails', '~> 6.0.0'
 gem 'pg'
 # 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', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 9be3e55..ecc8868 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,8 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.6)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (2.2.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
@@ -169,7 +170,7 @@ DEPENDENCIES
   jwt
   listen (>= 3.0.5, < 3.2)
   pg
-  puma (~> 3.12)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.0)
   redis (~> 4.0)