diff --git a/Gemfile.lock b/Gemfile.lock
index 4fadb7d..54d5514 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     diff-lcs (1.1.3)
     hanging_methods (0.0.3)
     hitimes (1.2.4)
-    rake (10.1.0)
+    rake (13.0.1)
     rspec (2.9.0)
       rspec-core (~> 2.9.0)
       rspec-expectations (~> 2.9.0)