diff --git a/middleman-more/lib/middleman-more.rb b/middleman-more/lib/middleman-more.rb
index 4e3b99a2..ce9580dc 100644
--- a/middleman-more/lib/middleman-more.rb
+++ b/middleman-more/lib/middleman-more.rb
@@ -64,10 +64,8 @@ module Middleman
 
         # RelativeAssets allow any asset path in dynamic templates to be either
         # relative to the root of the project or use an absolute URL.
-        Middleman::Extensions.register(:relative_assets) do
-          require "middleman-more/extensions/relative_assets"
-          Middleman::Extensions::RelativeAssets
-        end
+        require "middleman-more/extensions/relative_assets"
+        Middleman::Extensions::RelativeAssets.register
 
         # GZIP assets and pages during build
         require "middleman-more/extensions/gzip"
diff --git a/middleman-more/lib/middleman-more/extensions/relative_assets.rb b/middleman-more/lib/middleman-more/extensions/relative_assets.rb
index c848f672..20583d03 100644
--- a/middleman-more/lib/middleman-more/extensions/relative_assets.rb
+++ b/middleman-more/lib/middleman-more/extensions/relative_assets.rb
@@ -1,44 +1,28 @@
-# Extension namespace
-module Middleman
-  module Extensions
+# Relative Assets extension
+class Middleman::Extensions::RelativeAssets < ::Middleman::Extension
 
-    # Relative Assets extension
-    module RelativeAssets
+  def initialize(app, options_hash={}, &block)
+    super
 
-      # Setup extension
-      class << self
+    # After compass is setup, make it use the registered cache buster
+    app.compass_config do |config|
+      config.relative_assets = true
+    end
+  end
 
-        # Once registered
-        def registered(app)
-          # Tell compass to use relative assets
-          app.compass_config do |config|
-            config.relative_assets = true
-          end
+  helpers do
+    # asset_url override for relative assets
+    # @param [String] path
+    # @param [String] prefix
+    # @return [String]
+    def asset_url(path, prefix="")
+      path = super(path, prefix)
 
-          # Include instance methods
-          app.send :include, InstanceMethods
-        end
-
-        alias :included :registered
-      end
-
-      # Relative Assets instance method
-      module InstanceMethods
-
-        # asset_url override for relative assets
-        # @param [String] path
-        # @param [String] prefix
-        # @return [String]
-        def asset_url(path, prefix="")
-          path = super(path, prefix)
-
-          if path.include?("//") || !current_resource
-            path
-          else
-            current_dir = Pathname('/' + current_resource.destination_path)
-            Pathname(path).relative_path_from(current_dir.dirname).to_s
-          end
-        end
+      if path.include?("//") || !current_resource
+        path
+      else
+        current_dir = Pathname('/' + current_resource.destination_path)
+        Pathname(path).relative_path_from(current_dir.dirname).to_s
       end
     end
   end