diff --git a/Gemfile.lock b/Gemfile.lock
index 8da6a6a..d0a6a07 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       middleware
       thor
       thread_safe
-    rack (1.6.11)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.11.1)