diff --git a/Gemfile.lock b/Gemfile.lock
index fefa97ac9..6e2c1e3b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,7 +126,7 @@ GEM
       coderay (~> 1.0)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.6.2)
+    rack (1.6.13)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rack-protection (1.5.2)