diff --git a/Gemfile b/Gemfile
index 41e6123..d81b598 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # Use postgres as the database for Active Record
 gem 'pg'
 # 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 24a85bf..d1d850e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -137,14 +137,16 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.1)
     multi_json (1.14.1)
     multipart-post (2.1.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     parallel (1.19.1)
@@ -158,7 +160,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.3)
-    puma (4.3.1)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.1.1)
     rack-proxy (0.6.5)
@@ -307,7 +309,7 @@ DEPENDENCIES
   pg
   pry
   pry-rails
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   rails-controller-testing
   rspec-rails (= 4.0.0.beta3)