diff --git a/src/MvcMembership/Properties/AssemblyInfo.cs b/src/MvcMembership/Properties/AssemblyInfo.cs
index 05d9e3a..df77c60 100644
--- a/src/MvcMembership/Properties/AssemblyInfo.cs
+++ b/src/MvcMembership/Properties/AssemblyInfo.cs
@@ -19,6 +19,11 @@
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
+// Fix for error with MVC 5: 
+// Compiling transformation: The type or namespace name 'MvcTextTemplateHost' 
+// could not be found (are you missing a using directive or an assembly reference
+[assembly: SecurityRules(SecurityRuleSet.Level1)]
+
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
@@ -41,4 +46,4 @@
 // [assembly: AssemblyVersion("1.0.*")]
 
 [assembly: AssemblyVersion("3.8.0")]
-[assembly: AssemblyFileVersion("3.8.0")]
\ No newline at end of file
+[assembly: AssemblyFileVersion("3.8.0")]