diff --git a/Gemfile b/Gemfile
index a537e94..afaa21d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.5.3'
 gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 gem 'sqlite3', '~> 1.4'
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 gem 'sass-rails', '>= 6'
 gem 'webpacker', '~> 4.0'
 gem 'turbolinks', '~> 5'
diff --git a/Gemfile.lock b/Gemfile.lock
index a0a6560..20354a5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -117,7 +117,7 @@ GEM
     parser (2.7.0.4)
       ast (~> 2.4.0)
     public_suffix (4.0.4)
-    puma (4.3.3)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -244,7 +244,7 @@ DEPENDENCIES
   devise
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.2)
   rubocop