diff --git a/Gemfile.lock b/Gemfile.lock
index 19838f5..2fbfc5f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -178,7 +178,7 @@ GEM
     polyamorous (1.3.0)
       activerecord (>= 3.0)
     power_assert (0.2.7)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.5.1)