diff --git a/6006/ps3/circuit2/visualizer/Gemfile.lock b/6006/ps3/circuit2/visualizer/Gemfile.lock
index 315ab20..6c634b9 100644
--- a/6006/ps3/circuit2/visualizer/Gemfile.lock
+++ b/6006/ps3/circuit2/visualizer/Gemfile.lock
@@ -10,14 +10,14 @@ GEM
       multi_json (~> 1.0)
     libv8 (3.3.10.2)
     multi_json (1.0.3)
-    rack (1.3.3)
+    rack (1.6.13)
     rake (0.9.2)
     sass (3.1.7)
     shotgun (0.9)
       rack (>= 1.0)
     sinatra (1.2.6)
       rack (~> 1.1)
-      tilt (< 2.0, >= 1.2.2)
+      tilt (>= 1.2.2, < 2.0)
     therubyracer (0.9.4)
       libv8 (~> 3.3.10)
     tilt (1.3.3)