diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 08f146f..176aa52 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
     padrino-support (0.13.3.1)
       activesupport (>= 3.1)
     parallel (1.9.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)