diff --git a/Gemfile.lock b/Gemfile.lock
index 90b2ed4..610e4fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,13 +19,11 @@ GEM
     columnize (0.3.6)
     diff-lcs (1.1.3)
     i18n (0.6.0)
-    json (1.6.4)
     linecache19 (0.5.12)
       ruby_core_source (>= 0.1.4)
     multi_json (1.0.4)
     nyan-cat-formatter (0.0.5)
-    rdoc (3.12)
-      json (~> 1.4)
+    rdoc (6.3.1)
     rspec (2.7.0)
       rspec-core (~> 2.7.0)
       rspec-expectations (~> 2.7.0)