diff --git a/Gemfile b/Gemfile
index 4f31b11..0c1940c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3', '~> 1.4'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index a01d6b2..97a7b94 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.13.0)
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     pry (0.12.2)
@@ -109,7 +109,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-proxy (0.6.5)
@@ -212,7 +212,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
   pry-rails
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.1)
   sass-rails (>= 6)
   selenium-webdriver