diff --git a/replacement_sedml/BIOMD0000001065/vonDassow2000_1x4.timecourse1.sedml b/replacement_sedml/BIOMD0000001065/vonDassow2000_1x4.timecourse1.sedml
index 6fe6c674d..592677088 100644
--- a/replacement_sedml/BIOMD0000001065/vonDassow2000_1x4.timecourse1.sedml
+++ b/replacement_sedml/BIOMD0000001065/vonDassow2000_1x4.timecourse1.sedml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Created by COPASI version 4.39 (Build 272) on 2023-03-22 11:14 with libSBML version 5.19.4. -->
 <!-- Updted by hand by Lucian Smith -->
-<sedML xmlns="http://sed-ml.org/sed-ml/level1/version4" xmlns:sbml="http://www.sbml.org/sbml/level2/version4" level="1" version="4">
+<sedML xmlns="http://sed-ml.org/sed-ml/level1/version4" xmlns:sbml="http://www.sbml.org/sbml/level3/version1/core" level="1" version="4">
   <listOfModels>
     <model id="model" language="urn:sedml:language:sbml" source="vonDassow2000_1x4.timecourse1.xml"/>
   </listOfModels>