diff --git a/2021/Paketo/backend/Gemfile.lock b/2021/Paketo/backend/Gemfile.lock
index 24bf3f4..e8c156d 100644
--- a/2021/Paketo/backend/Gemfile.lock
+++ b/2021/Paketo/backend/Gemfile.lock
@@ -88,10 +88,12 @@ GEM
     nio4r (2.5.7)
     nokogiri (1.11.7-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.11.7-x86_64-linux)
+      racc (~> 1.4)
     puma (5.3.2)
       nio4r (~> 2.0)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-test (1.1.0)
@@ -137,6 +139,8 @@ GEM
     thor (1.1.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
+    tzinfo-data (1.2022.7)
+      tzinfo (>= 1.0.0)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -144,6 +148,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)