diff --git a/Gemfile.lock b/Gemfile.lock
index e8872e8..586166d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     mocha (0.9.8)
       rake
     proxies (0.2.1)
-    rake (0.8.7)
+    rake (13.0.6)
     test-unit (2.1.1)
 
 PLATFORMS