diff --git a/examples/camping/Gemfile.lock b/examples/camping/Gemfile.lock
index af5aae1c..a9220744 100644
--- a/examples/camping/Gemfile.lock
+++ b/examples/camping/Gemfile.lock
@@ -1,15 +1,16 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     builder (3.0.0)
     camping (2.1)
       rack (>= 1.0)
     markaby (0.7.1)
       builder (>= 2.0.0)
-    rack (1.2.1)
+    rack (2.2.14)
 
 PLATFORMS
   java
+  x86_64-linux
 
 DEPENDENCIES
   camping