diff --git a/Gemfile.lock b/Gemfile.lock
index c2fb737..088a781 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,6 @@ GEM
       git (>= 1.2.5)
       rake
       rdoc
-    json (1.8.3)
     multi_json (1.5.0)
     pdf-reader (1.3.0)
       Ascii85 (~> 1.0.0)
@@ -30,8 +29,7 @@ GEM
       pdf-reader (>= 0.9.0)
       ttfunk (~> 1.0.2)
     rake (10.0.3)
-    rdoc (3.12)
-      json (~> 1.4)
+    rdoc (6.1.2.1)
     rspec (2.12.0)
       rspec-core (~> 2.12.0)
       rspec-expectations (~> 2.12.0)