diff --git a/EnvelopeGenerator.Domain/Entities/Annotation.cs b/EnvelopeGenerator.Domain/Entities/Annotation.cs
index e08f9ab6..f2e59402 100644
--- a/EnvelopeGenerator.Domain/Entities/Annotation.cs
+++ b/EnvelopeGenerator.Domain/Entities/Annotation.cs
@@ -17,7 +17,7 @@ public class Annotation
     [Key]
     [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
     [Column("GUID", TypeName = "int")]
-    public int Guid { get; set; }
+    public long Id { get; set; }
 
     [Required]
     [Column("ELEMENT_ID", TypeName = "int")]