diff --git a/TrustFrameworkPolicy_0.3.0.0.xsd b/TrustFrameworkPolicy_0.3.0.0.xsd
index 13c201c..48c3349 100644
--- a/TrustFrameworkPolicy_0.3.0.0.xsd
+++ b/TrustFrameworkPolicy_0.3.0.0.xsd
@@ -3686,7 +3686,7 @@
     </xs:annotation>
     <xs:restriction base="xs:string">
       <xs:pattern value="^(http://|https://|~/)([\w.,@?^=%&amp;:~+#\-_$!’();]+/)*([\w.,@?^=%&amp;:~+#\-_$!’();]+/?)$" />
-      <xs:pattern value="^urn:[a-z0-9][a-z0-9-]{0,31}:[a-z0-9()+,\/\-.:=@;$_!*'%\/?#]+$" />
+      <xs:pattern value="^urn:[a-z0-9][a-z0-9-]{0,31}:[a-z0-9()+,/\-.:=@;$_!*'%?#]+$" />
     </xs:restriction>
   </xs:simpleType>