diff --git a/src/Orchard.Web/Modules/Orchard.Widgets/Migrations.cs b/src/Orchard.Web/Modules/Orchard.Widgets/Migrations.cs
index 838ea4928..cc16abf4a 100644
--- a/src/Orchard.Web/Modules/Orchard.Widgets/Migrations.cs
+++ b/src/Orchard.Web/Modules/Orchard.Widgets/Migrations.cs
@@ -1,5 +1,6 @@
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.MetaData;
+using Orchard.Core.Contents.Extensions;
 using Orchard.Data.Migration;
 using Orchard.Widgets.Models;
 
@@ -78,5 +79,12 @@ namespace Orchard.Widgets {
 
             return 3;
         }
+
+        public int UpdateFrom3()
+        {
+            ContentDefinitionManager.AlterPartDefinition("WidgetPart", builder => builder.Attachable());
+
+            return 4;
+        }
     }
 }
\ No newline at end of file