diff --git a/smtweb-framework/bpm/src/main/resources/static/template/default/model_card_flow.ftl b/smtweb-framework/bpm/src/main/resources/static/template/default/model_card_flow.ftl
index 67d5491..3bd7e80 100644
--- a/smtweb-framework/bpm/src/main/resources/static/template/default/model_card_flow.ftl
+++ b/smtweb-framework/bpm/src/main/resources/static/template/default/model_card_flow.ftl
@@ -739,7 +739,8 @@
 "clearable": true,
 "labelWidth": 100,
 "affixError": true,
-"size": "default"
+"size": "default",
+"multiple": true
 },
 "events": {},
 "vars": {