diff --git a/Gemfile.lock b/Gemfile.lock
index 9904895..7ef8229 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     mocha (0.10.5)
       metaclass (~> 0.0.1)
     multi_json (1.6.1)
-    rake (10.0.3)
+    rake (13.0.1)
     rdoc (4.0.0)
       json (~> 1.4)
     shoulda (3.3.2)