diff --git a/package.json b/package.json
index fe9fd71..fc41ebf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@sharkitek/core",
-	"version": "2.1.2",
+	"version": "2.1.3",
 	"description": "Sharkitek core models library.",
 	"keywords": [
 		"sharkitek",
diff --git a/src/Model/Types/DateType.ts b/src/Model/Types/DateType.ts
index 0607a31..2337efb 100644
--- a/src/Model/Types/DateType.ts
+++ b/src/Model/Types/DateType.ts
@@ -12,7 +12,7 @@ export class DateType extends Type<string, Date>
 
 	serialize(value: Date): string
 	{
-		return value.toISOString();
+		return value?.toISOString();
 	}
 }