diff --git a/EnvelopeGenerator.Domain/Entities/EnvelopeDocument.cs b/EnvelopeGenerator.Domain/Entities/EnvelopeDocument.cs
index 4570c765..5407cbdc 100644
--- a/EnvelopeGenerator.Domain/Entities/EnvelopeDocument.cs
+++ b/EnvelopeGenerator.Domain/Entities/EnvelopeDocument.cs
@@ -1,6 +1,7 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 #if NETFRAMEWORK
+using System.Drawing;
 using System.Collections.Generic;
 using System.Linq;
 #endif