diff --git a/Gemfile.lock b/Gemfile.lock
index 6afee7e..7208a8a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
     orm_adapter (0.5.0)
     protected_attributes (1.1.3)
       activemodel (>= 4.0.1, < 5.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.5.2)