diff --git a/examples/camping/Gemfile.lock b/examples/camping/Gemfile.lock
index af5aae1c..9c292f0d 100644
--- a/examples/camping/Gemfile.lock
+++ b/examples/camping/Gemfile.lock
@@ -6,10 +6,11 @@ GEM
       rack (>= 1.0)
     markaby (0.7.1)
       builder (>= 2.0.0)
-    rack (1.2.1)
+    rack (2.2.8.1)
 
 PLATFORMS
   java
+  ruby
 
 DEPENDENCIES
   camping