diff --git a/src/Orchard.Startup/Properties/AssemblyInfo.cs b/src/Orchard.Startup/Properties/AssemblyInfo.cs
index 7da469bba..253c13ddc 100644
--- a/src/Orchard.Startup/Properties/AssemblyInfo.cs
+++ b/src/Orchard.Startup/Properties/AssemblyInfo.cs
@@ -1,6 +1,7 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Security;
 
 // General Information about an assembly is controlled through the following 
 // set of attributes. Change these attribute values to modify the information
@@ -33,3 +34,6 @@ using System.Runtime.InteropServices;
 // [assembly: AssemblyVersion("1.0.*")]
 [assembly: AssemblyVersion("1.0.20")]
 [assembly: AssemblyFileVersion("1.0.20")]
+
+// Enable web application to call this assembly in Full Trust
+[assembly: AllowPartiallyTrustedCallers]
\ No newline at end of file