diff --git a/spec/sample_projects/rack_19/Gemfile.lock b/spec/sample_projects/rack_19/Gemfile.lock
index 702c49b..8c57a20 100644
--- a/spec/sample_projects/rack_19/Gemfile.lock
+++ b/spec/sample_projects/rack_19/Gemfile.lock
@@ -1,11 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (1.5.2)
+    rack (1.6.12)
     rake (10.3.1)
 
 PLATFORMS
   java
+  ruby
 
 DEPENDENCIES
   rack