diff --git a/src/Autofac.Extras.DomainServices/Properties/AssemblyInfo.cs b/src/Autofac.Extras.DomainServices/Properties/AssemblyInfo.cs
index cdb3239..24e0127 100644
--- a/src/Autofac.Extras.DomainServices/Properties/AssemblyInfo.cs
+++ b/src/Autofac.Extras.DomainServices/Properties/AssemblyInfo.cs
@@ -1,10 +1,12 @@
 using System;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Security;
 
 [assembly: AssemblyTitle("Autofac.Extras.DomainServices")]
 [assembly: ComVisible(false)]
 [assembly: CLSCompliant(true)]
+[assembly: AllowPartiallyTrustedCallers]
 
 [assembly: AssemblyCompany("Autofac Project - http://autofac.org")]
 [assembly: AssemblyProduct("Autofac")]