diff --git a/Gemfile b/Gemfile
index f04e163..1e93fcd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.3'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.3.8'
+gem 'puma', '~> 4.3.11'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 59ed678..bbad1e3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -132,7 +132,7 @@ GEM
     mini_portile2 (2.5.1)
     minitest (5.14.4)
     msgpack (1.4.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.5)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -143,7 +143,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
-    puma (4.3.8)
+    puma (4.3.11)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -243,7 +243,7 @@ DEPENDENCIES
   mini_magick (~> 4.8)
   pg (>= 0.18, < 2.0)
   pry-rails
-  puma (~> 4.3.8)
+  puma (~> 4.3.11)
   rails (~> 5.2.3)
   sass-rails (~> 5.0)
   selenium-webdriver