diff --git a/sample_app/Gemfile.lock b/sample_app/Gemfile.lock
index fc6bd39..51f2f6b 100644
--- a/sample_app/Gemfile.lock
+++ b/sample_app/Gemfile.lock
@@ -364,7 +364,7 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
-    rake (12.3.1)
+    rake (13.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)