diff --git a/specifications/build.xml b/specifications/build.xml
index 5564ed773d8267e5264b165c3022adb8c630f424..31dab972e35cc6ad0e9ac1b7c9148331f746d438 100644
--- a/specifications/build.xml
+++ b/specifications/build.xml
@@ -103,18 +103,20 @@
 	
 	<target name="download.SISO">
 		
-		<property name="SISO-REF-010" value="SISO-REF-010-v24.zip"/>
+		<property name="SISO-REF-010" value="SISO-REF-010-v26.zip"/>
 		<echo message="get ${SISO-REF-010}"/>
         <get     src="${sisoBaseUrl}46171"
                 dest="${SISO-REF-010}" verbose="true"/>
 		<unzip   src="${SISO-REF-010}"
 		        dest="" overwrite="true"/>
 		<delete file="${SISO-REF-010}"/>
-		
-		<property name="SISO-REF-010.1" value="SISO-REF-010.1-2018 Operations Manual for EWG V07.pdf"/>
+        
+		<!-- duplicative, already contained in preceding zip
+		<property name="SISO-REF-010.1" value="SISO-REF-010.1-2019 Operations Manual for EWG V08.pdf"/>
 		<echo message="get ${SISO-REF-010.1}"/>
         <get     src="${sisoBaseUrl}46173"
                 dest="${SISO-REF-010.1}" verbose="true"/>
+        -->
 
 	</target>