diff --git a/Gemfile.lock b/Gemfile.lock
index 79a6e4b..bcedb7a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,7 +68,7 @@ GEM
     net-ssh-gateway (1.1.0)
       net-ssh (>= 1.99.1)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)