diff --git a/Gemfile.lock b/Gemfile.lock
index 050e8a6..0d7d724 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
       activesupport (= 2.3.18)
     activesupport (2.3.18)
     diff-lcs (1.1.2)
-    rake (0.8.7)
+    rake (13.0.1)
     rspec (2.6.0)
       rspec-core (~> 2.6.0)
       rspec-expectations (~> 2.6.0)