diff --git a/vast3_draft.xsd b/vast3_draft.xsd
index 63a0a39..ae8b98c 100644
--- a/vast3_draft.xsd
+++ b/vast3_draft.xsd
@@ -260,7 +260,7 @@
                                   <xs:documentation>The preferred order in which multiple Creatives should be displayed</xs:documentation>
                                 </xs:annotation>
                               </xs:attribute>
-                              <xs:attribute name="AdID" type="xs:string" use="optional">
+                              <xs:attribute name="adId" type="xs:string" use="optional">
                                 <xs:annotation>
                                   <xs:documentation>Ad-ID for the creative (formerly ISCI)</xs:documentation>
                                 </xs:annotation>
@@ -385,7 +385,7 @@
                                   <xs:documentation>The preferred order in which multiple Creatives should be displayed</xs:documentation>
                                 </xs:annotation>
                               </xs:attribute>
-                              <xs:attribute name="AdID" type="xs:string" use="optional">
+                              <xs:attribute name="adId" type="xs:string" use="optional">
                                 <xs:annotation>
                                   <xs:documentation>Ad-ID for the creative (formerly ISCI)</xs:documentation>
                                 </xs:annotation>
@@ -1033,4 +1033,4 @@
       </xs:extension>
     </xs:simpleContent>
   </xs:complexType>
-</xs:schema>
\ No newline at end of file
+</xs:schema>