diff --git a/Gemfile b/Gemfile
index c93d928..4a394ed 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem "bootsnap", ">= 1.4.2", require: false
 gem "faker"
 gem "jbuilder", "~> 2.7"
 gem "pg", ">= 0.18", "< 2.0"
-gem "puma", "~> 3.11"
+gem "puma", "~> 4.3"
 gem "rails", "~> 6.0.0"
 gem "redis", "~> 4.0"
 gem "sass-rails", "~> 5"
diff --git a/Gemfile.lock b/Gemfile.lock
index af8ec49..394d119 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-proxy (0.6.5)
       rack
@@ -259,7 +260,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry-rails
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 6.0.0)
   redis (~> 4.0)
   sass-rails (~> 5)