diff --git a/Gemfile.lock b/Gemfile.lock
index d8fde50..03dbb87 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     open4 (1.3.4)
     pg (0.20.0)
     public_suffix (2.0.5)
-    rack (1.6.5)
+    rack (1.6.12)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)