diff --git a/Gemfile.lock b/Gemfile.lock
index 79c9523..c4bda6e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,8 +21,7 @@ GEM
     multi_json (1.1.0)
     rack (1.4.1)
     rake (0.9.2.2)
-    rdoc (3.12)
-      json (~> 1.4)
+    rdoc (6.3.2)
     rspec (2.9.0)
       rspec-core (~> 2.9.0)
       rspec-expectations (~> 2.9.0)