diff --git a/Gemfile.lock b/Gemfile.lock
index 8c173fd..f6f6cff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     minitest (5.6.0)
     mocha (1.1.0)
       metaclass (~> 0.0.1)
-    rake (10.3.2)
+    rake (12.3.3)
     thread_safe (0.3.5)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)