diff --git a/Gemfile.lock b/Gemfile.lock
index 2873b4a..8357100 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     rack (1.5.2)
-    rake (10.1.0)
+    rake (13.0.1)
     rdoc (4.0.1)
       json (~> 1.4)
     rspec (2.7.0)