diff --git a/website/docs/Gemfile.lock b/website/docs/Gemfile.lock
index a831bb2e2..c88f8653b 100644
--- a/website/docs/Gemfile.lock
+++ b/website/docs/Gemfile.lock
@@ -22,6 +22,7 @@ GEM
     eventmachine (1.0.3)
     execjs (1.4.0)
       multi_json (~> 1.0)
+    ffi (1.9.3)
     fssm (0.2.10)
     haml (4.0.3)
       tilt
@@ -92,6 +93,8 @@ GEM
     rack-test (0.6.2)
       rack (>= 1.0)
     rb-fsevent (0.9.3)
+    rb-inotify (0.9.3)
+      ffi (>= 0.5.0)
     redcarpet (2.2.2)
     ref (1.0.5)
     sass (3.2.10)
@@ -136,6 +139,7 @@ DEPENDENCIES
   middleman (~> 3.0.6)
   middleman-minify-html (~> 3.0.0)
   rack-contrib (~> 1.1.0)
+  rb-inotify (~> 0.9)
   redcarpet (~> 2.2.2)
   therubyracer (~> 0.12.0)
   thin (~> 1.5.0)