diff --git a/CDT-commonTypes.xsd b/CDT-commonTypes.xsd
index 3ca88c46be75cc8b01220b48b8df3705c5feadfe..82df607b7d3ccb8cedaedefce8d62281f6575010 100644
--- a/CDT-commonTypes.xsd
+++ b/CDT-commonTypes.xsd
@@ -449,8 +449,10 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 
 	<xs:simpleType name="releaseVersion">
 		<xs:restriction base="xs:string" >
+			<xs:pattern value="2"/>
 			<xs:pattern value="2a"/>
 			<xs:pattern value="3"/>
+			<xs:pattern value="4"/>
 		</xs:restriction>
 	</xs:simpleType>
 	
@@ -460,6 +462,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 			<xs:pattern value="2"/>
 			<xs:pattern value="2a"/>
 			<xs:pattern value="3"/>
+			<xs:pattern value="4"/>
 		</xs:restriction>
 	</xs:simpleType>