diff --git a/Gemfile.lock b/Gemfile.lock
index c0d90e3..01c6062 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     metaclass (0.0.1)
     mocha (0.10.0)
       metaclass (~> 0.0.1)
-    rake (0.9.2)
+    rake (13.0.1)
     rspec (2.6.0)
       rspec-core (~> 2.6.0)
       rspec-expectations (~> 2.6.0)