diff --git a/Gemfile.lock b/Gemfile.lock
index 879c3e9..caa852e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
   specs:
     diff-lcs (1.1.2)
     json (1.5.1)
-    rake (0.8.7)
+    rake (13.0.1)
     rspec (2.4.0)
       rspec-core (~> 2.4.0)
       rspec-expectations (~> 2.4.0)