CREATE PROCEDURE Permission Denied In Database

i'm using SQLCacheDependency in my code. I have ran following lines to enable SQL notification.


ALTER DATABASE [DataBaseName] SET SINGLE_USER WITH ROLLBACK IMMEDIATE

ALTER DATABASE [DataBaseName] SET ENABLE_BROKER

ALTER DATABASE [DataBaseName] SET ARITHABORT ON

ALTER DATABASE [DataBaseName] SET MULTI_USER WITH ROLLBACK IMMEDIATE

In Global.asax file, i have protected void Application_Start(object sender, EventArgs e)
{
SqlDependency.Start(CONNECTION_STRING);
} but whenever my application starts i get error saying "CREATE PROCEDURE permission denied in database", if i give dbo owner permission to SQL user then it works fine, but ofcource i dont want to give dbo owner permission to sql user defined in connection string