diff --git a/Gemfile.lock b/Gemfile.lock
index 0944939..bd5be35 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     multi_json (1.11.2)
     multi_test (0.1.2)
     rake (10.4.2)
-    rdoc (4.2.0)
+    rdoc (6.3.2)
     rspec (3.4.0)
       rspec-core (~> 3.4.0)
       rspec-expectations (~> 3.4.0)