diff --git a/guides/08-Continuous-Integration/simple-sinatra-app-to-deploy/Gemfile.lock b/guides/08-Continuous-Integration/simple-sinatra-app-to-deploy/Gemfile.lock
index 569734b..33fac31 100644
--- a/guides/08-Continuous-Integration/simple-sinatra-app-to-deploy/Gemfile.lock
+++ b/guides/08-Continuous-Integration/simple-sinatra-app-to-deploy/Gemfile.lock
@@ -13,12 +13,15 @@ GEM
       xpath (~> 3.2)
     diff-lcs (1.4.4)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
+    nio4r (2.7.0)
+    nokogiri (1.16.2-x86_64-linux)
+      racc (~> 1.4)
     public_suffix (4.0.6)
+    puma (6.4.2)
+      nio4r (~> 2.0)
+    racc (1.7.3)
     rack (2.2.3)
     rack-protection (2.1.0)
       rack
@@ -49,11 +52,11 @@ GEM
       nokogiri (~> 1.8)
 
 PLATFORMS
-  ruby
-  x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   capybara
+  puma
   rspec
   sinatra