diff --git a/admin/environment.xml b/admin/environment.xml
index 652251bec41..2b8d4ef40e5 100644
--- a/admin/environment.xml
+++ b/admin/environment.xml
@@ -2259,7 +2259,7 @@
       </CUSTOM_CHECK>
     </CUSTOM_CHECKS>
   </MOODLE>
-  <MOODLE version="3.5" requires="3.0">
+  <MOODLE version="3.5" requires="3.1">
     <UNICODE level="required">
       <FEEDBACK>
         <ON_ERROR message="unicoderequired" />