diff --git a/Gemfile.lock b/Gemfile.lock
index 6c3754f..503d4b6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,7 +169,7 @@ GEM
     os (1.0.0)
     public_suffix (3.0.2)
     puma (3.12.0)
-    rack (1.6.10)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)