diff --git a/Gemfile b/Gemfile
index 18d76c2..8936c32 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ ruby '2.6.5'
 
 gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 gem 'mysql2'
-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 648df40..d7f501a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,11 +100,11 @@ GEM
     minitest (5.14.1)
     msgpack (1.3.3)
     mysql2 (0.5.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-proxy (0.6.5)
@@ -206,7 +206,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
   mysql2
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   sass-rails (>= 6)
   selenium-webdriver