diff --git a/Gemfile.lock b/Gemfile.lock
index 788e55b..d1e63e5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
       rack (>= 1.1, < 2.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.0)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.0)