diff --git a/Gemfile.lock b/Gemfile.lock
index 820932a..556ee38 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -315,7 +315,7 @@ GEM
     protected_attributes (1.1.3)
       activemodel (>= 4.0.1, < 5.0)
     public_suffix (3.0.3)
-    rack (1.6.4)
+    rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
     rack-timeout (0.1.1)