diff --git a/Gemfile b/Gemfile
index ea6d922..a3acd58 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'uglifier'
 gem 'coffee-rails'
 gem 'jquery-rails'
 # 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 c53df9d..c1a8993 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,12 +124,12 @@ GEM
       minitest (>= 5.0)
       ruby-progressbar
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-proxy (0.6.5)
@@ -248,7 +248,7 @@ DEPENDENCIES
   mini_backtrace
   minitest-reporters
   pg
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.1)
   rails_12factor
   sass-rails (>= 6)