diff --git a/Gemfile.lock b/Gemfile.lock
index 186dc02..ad19d28 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
       rake
       rdoc
     json (1.5.1)
-    rake (0.9.2.2)
+    rake (13.0.1)
     rcov (0.9.9)
     rdoc (3.12)
       json (~> 1.4)