diff --git a/src/main/resources/message_schema.xsd b/src/main/resources/message_schema.xsd
index 1b2f451..b902bcc 100644
--- a/src/main/resources/message_schema.xsd
+++ b/src/main/resources/message_schema.xsd
@@ -19,7 +19,7 @@
 				<xs:complexType>
 					<xs:sequence>
 						<xs:element name="Sender" type="xs:string" />
-						<xs:element name="Recipient" type="xs:string" />
+						<xs:element name="Recipient" type="xs:long" />
 						<xs:element name="Date" type="xs:date" />
 						<xs:element name="State" type="xs:boolean" />
 					</xs:sequence>