diff --git a/structuredefinitions/UKCore-CarePlan.xml b/structuredefinitions/UKCore-CarePlan.xml
index c0a29f5e..a54cf850 100644
--- a/structuredefinitions/UKCore-CarePlan.xml
+++ b/structuredefinitions/UKCore-CarePlan.xml
@@ -60,7 +60,7 @@
       <short value="Type of actions or events that should occur after the closure of an episode." />
       <mustSupport value="true" />
       <binding>
-        <strength value="extensible" />
+        <strength value="preferred" />
         <valueSet value="https://fhir.nhs.uk/England/ValueSet/England-EpisodeFinalActionCode" />
       </binding>
     </element>