diff --git a/Gemfile.lock b/Gemfile.lock
index 05052ea..a0aba4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     instrumental_agent (0.8.2)
     kgio (2.9.2)
     multipart-post (1.1.4)
-    rack (1.3.5)
+    rack (1.6.13)
     rack-protection (1.1.4)
       rack
     raindrops (0.13.0)