diff --git a/Gemfile.lock b/Gemfile.lock
index f25fd96..c4ae654 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
       mime-types
       mimemagic (= 0.3.0)
     pg (0.19.0)
-    rack (1.6.5)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)