diff --git a/2021/Paketo/backend/Gemfile b/2021/Paketo/backend/Gemfile
index ff5dbc0..2a35aa5 100644
--- a/2021/Paketo/backend/Gemfile
+++ b/2021/Paketo/backend/Gemfile
@@ -6,7 +6,7 @@ ruby '~>3.0.0'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
 gem 'rails', '~> 6.1.4'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.6'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.7'
 # Use Active Model has_secure_password
diff --git a/2021/Paketo/backend/Gemfile.lock b/2021/Paketo/backend/Gemfile.lock
index 24bf3f4..e644b34 100644
--- a/2021/Paketo/backend/Gemfile.lock
+++ b/2021/Paketo/backend/Gemfile.lock
@@ -85,10 +85,12 @@ GEM
     mini_mime (1.1.0)
     minitest (5.14.4)
     msgpack (1.4.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.7-x86_64-darwin)
       racc (~> 1.4)
-    puma (5.3.2)
+    nokogiri (1.11.7-x86_64-linux)
+      racc (~> 1.4)
+    puma (5.6.2)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -137,6 +139,8 @@ GEM
     thor (1.1.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
+    tzinfo-data (1.2021.5)
+      tzinfo (>= 1.0.0)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -144,12 +148,13 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)
   byebug
   listen (~> 3.3)
-  puma (~> 5.0)
+  puma (~> 5.6)
   rack-cors
   rails (~> 6.1.4)
   spring