diff --git a/config.rb b/config.rb
index 2488797..b3ba23e 100644
--- a/config.rb
+++ b/config.rb
@@ -40,6 +40,7 @@ set :relative_links, true
 
 # Build Configuration
 configure :build do
+  activate :asset_hash
   # If you're having trouble with Middleman hanging, commenting
   # out the following two lines has been known to help
   activate :minify_css