diff --git a/Gemfile b/Gemfile
index 4841999..129897a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'sqlite3', '~> 1.4', groups: [:test, :development], require: false
 gem 'pg', groups: :production, require: false
 
 # 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 ad71f1e..9a4bf3e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,7 +152,7 @@ GEM
     minitest (5.14.2)
     msgpack (1.3.3)
     murmurhash3 (0.1.6)
-    nio4r (2.5.4)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     parallel (1.19.2)
@@ -165,7 +165,7 @@ GEM
       thor
       thread_safe
     public_suffix (4.0.6)
-    puma (4.3.6)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-proxy (0.6.5)
@@ -349,7 +349,7 @@ DEPENDENCIES
   listen (~> 3.2)
   materialize-sass!
   pg
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.3, >= 6.0.3.3)
   rails-controller-testing
   rspec-rails