diff --git a/Gemfile.lock b/Gemfile.lock
index f4dfa11..0448047 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
     pg (0.18.2)
     prizm (0.0.3)
       rmagick
-    rack (1.6.1)
+    rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.1)