diff --git a/Gemfile.lock b/Gemfile.lock
index a1466d1..13dc22e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
       rack (>= 1.2, < 3)
     psych (3.3.1)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rake (10.5.0)
     rchardet (1.8.0)
     rdoc (6.3.0)