diff --git a/Services.ZUGFeRDService/My Project/AssemblyInfo.vb b/Services.ZUGFeRDService/My Project/AssemblyInfo.vb
index 4adf3ad7..3410833b 100644
--- a/Services.ZUGFeRDService/My Project/AssemblyInfo.vb	
+++ b/Services.ZUGFeRDService/My Project/AssemblyInfo.vb	
@@ -13,7 +13,7 @@ Imports System.Runtime.InteropServices
 <Assembly: AssemblyCompany("Digital Data")>
 <Assembly: AssemblyProduct("DDZUGFeRDService")>
 <Assembly: AssemblyCopyright("Copyright © 2021")>
-<Assembly: AssemblyTrademark("")>
+<Assembly: AssemblyTrademark("1800")>
 
 <Assembly: ComVisible(False)>