diff --git a/Gemfile.lock b/Gemfile.lock
index b3b0273..d947f7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
       rack (>= 1.2, < 3)
     pg (1.2.2)
     psych (3.1.0)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rake (13.0.1)
     rchardet (1.8.0)
     rdoc (6.2.1)