diff --git a/Gemfile.lock b/Gemfile.lock
index 29a8497..95c48b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -125,7 +125,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     oj (2.14.3)
     pg (0.18.4)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.4)