diff --git a/src/Umbraco.Core/Manifest/ManifestParser.cs b/src/Umbraco.Core/Manifest/ManifestParser.cs
index e1489a6d75..47dbfacb45 100644
--- a/src/Umbraco.Core/Manifest/ManifestParser.cs
+++ b/src/Umbraco.Core/Manifest/ManifestParser.cs
@@ -128,7 +128,14 @@ namespace Umbraco.Core.Manifest
                 {
                     throw new FormatException("The manifest is not formatted correctly contains more than one 'javascript' element");
                 }
-                
+
+                //validate the css
+                var cssinit = deserialized.Properties().Where(x => x.Name == "stylesheet").ToArray();
+                if (cssinit.Length > 1)
+                {
+                    throw new FormatException("The manifest is not formatted correctly contains more than one 'stylesheet' element");
+                }
+
                 //validate the property editors section
                 var propEditors = deserialized.Properties().Where(x => x.Name == "propertyEditors").ToArray();
                 if (propEditors.Length > 1)
@@ -139,6 +146,9 @@ namespace Umbraco.Core.Manifest
                 var jConfig = init.Any() ? (JArray)deserialized["javascript"] : new JArray();
                 ReplaceVirtualPaths(jConfig);
 
+                var cssConfig = cssinit.Any() ? (JArray)deserialized["stylesheet"] : new JArray();
+                ReplaceVirtualPaths(cssConfig);
+
                 //replace virtual paths for each property editor
                 if (deserialized["propertyEditors"] != null)
                 {
@@ -158,6 +168,7 @@ namespace Umbraco.Core.Manifest
                 var manifest = new PackageManifest()
                     {
                         JavaScriptInitialize = jConfig,
+                        StyleSheetInitialize = cssConfig,
                         PropertyEditors = propEditors.Any() ? (JArray)deserialized["propertyEditors"] : new JArray(),
                         ParameterEditors = propEditors.Any() ? (JArray)deserialized["parameterEditors"] : new JArray()
                     };
diff --git a/src/Umbraco.Core/Manifest/PackageManifest.cs b/src/Umbraco.Core/Manifest/PackageManifest.cs
index 7bf4a7c274..4426bb36fb 100644
--- a/src/Umbraco.Core/Manifest/PackageManifest.cs
+++ b/src/Umbraco.Core/Manifest/PackageManifest.cs
@@ -12,6 +12,11 @@ namespace Umbraco.Core.Manifest
         /// </summary>
         public JArray JavaScriptInitialize { get; set; }
 
+        /// <summary>
+        /// The json array used to initialize the application with the CSS dependencies required
+        /// </summary>
+        public JArray StyleSheetInitialize { get; set; }
+
         /// <summary>
         /// The json array of property editors
         /// </summary>
diff --git a/src/Umbraco.Web/Editors/BackOfficeController.cs b/src/Umbraco.Web/Editors/BackOfficeController.cs
index 8c17fcc663..a8a5dc2a63 100644
--- a/src/Umbraco.Web/Editors/BackOfficeController.cs
+++ b/src/Umbraco.Web/Editors/BackOfficeController.cs
@@ -34,8 +34,13 @@ namespace Umbraco.Web.Editors
         {
             var plugins = new DirectoryInfo(Server.MapPath("~/App_Plugins"));
             var parser = new ManifestParser(plugins);
-            var requireJs = new JsInitialization(parser);
-            var result = requireJs.GetJavascriptInitialization(JsInitialization.GetDefaultInitialization());
+            var initJs = new JsInitialization(parser);
+            var initCss = new CssInitialization(parser);
+
+
+            var result = initJs.GetJavascriptInitialization(JsInitialization.GetDefaultInitialization());
+            result += initCss.GetStylesheetInitialization();
+           
             return JavaScript(result);
         }
 
diff --git a/src/Umbraco.Web/UI/JavaScript/CssInitialization.cs b/src/Umbraco.Web/UI/JavaScript/CssInitialization.cs
new file mode 100644
index 0000000000..d7b486c46f
--- /dev/null
+++ b/src/Umbraco.Web/UI/JavaScript/CssInitialization.cs
@@ -0,0 +1,51 @@
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Umbraco.Core.IO;
+using Umbraco.Core.Manifest;
+
+namespace Umbraco.Web.UI.JavaScript
+{
+    internal class CssInitialization
+    {
+        private readonly ManifestParser _parser;
+
+        public CssInitialization(ManifestParser parser)
+        {
+            _parser = parser;
+        }
+
+        /// <summary>
+        /// Processes all found manifest files and outputs yepnope.injectcss calls for all css files found in all manifests
+        /// </summary>
+        public string GetStylesheetInitialization()
+        {
+            JArray merged = new JArray();    
+            foreach (var m in _parser.GetManifests())
+            {
+                ManifestParser.MergeJArrays(merged, m.StyleSheetInitialize);
+            }
+
+            return ParseMain(merged);
+        }
+
+       
+        /// <summary>
+        /// Parses the CssResources.Main and returns a yepnop.injectCss format
+        /// </summary>
+        /// <param name="replacements"></param>
+        /// <returns></returns>
+        internal static string ParseMain(JArray files)
+        {
+            StringBuilder sb = new StringBuilder();
+            foreach (var file in files)
+                sb.AppendFormat("{0}yepnope.injectCss('{1}');", Environment.NewLine, file);
+
+            return sb.ToString();
+        }
+
+    }
+}
diff --git a/src/Umbraco.Web/UI/JavaScript/JsInitialize.js b/src/Umbraco.Web/UI/JavaScript/JsInitialize.js
index 9e936f7c87..42ed1c270e 100644
--- a/src/Umbraco.Web/UI/JavaScript/JsInitialize.js
+++ b/src/Umbraco.Web/UI/JavaScript/JsInitialize.js
@@ -27,8 +27,8 @@
     */
 
     /* temporary sorter lib, should be updated
-    'lib/angular/angular-ui-sortable.js',*/
-    'lib/jquery/jquery.sortable/jquery.sortable.js',
+    'lib/angular/angular-ui-sortable.js',
+    'lib/jquery/jquery.sortable/jquery.sortable.js',*/
 
     /* App-wide file-upload helper */
     'lib/jquery/jquery.upload/js/jquery.fileupload.js',
diff --git a/src/Umbraco.Web/Umbraco.Web.csproj b/src/Umbraco.Web/Umbraco.Web.csproj
index d6c4f74347..161e183bc4 100644
--- a/src/Umbraco.Web/Umbraco.Web.csproj
+++ b/src/Umbraco.Web/Umbraco.Web.csproj
@@ -373,6 +373,7 @@
     <Compile Include="Trees\DataTypeTreeController.cs" />
     <Compile Include="Trees\MemberTreeController.cs" />
     <Compile Include="Trees\Menu\CreateChildEntity.cs" />
+    <Compile Include="UI\JavaScript\CssInitialization.cs" />
     <Compile Include="umbraco.presentation\umbraco\create.aspx.cs">
       <SubType>ASPXCodeBehind</SubType>
     </Compile>