diff --git a/bundles/org.openhab.ui/web/src/components/rule/module-wizard-mixin.js b/bundles/org.openhab.ui/web/src/components/rule/module-wizard-mixin.js
index c12a09cb1..1288743f0 100644
--- a/bundles/org.openhab.ui/web/src/components/rule/module-wizard-mixin.js
+++ b/bundles/org.openhab.ui/web/src/components/rule/module-wizard-mixin.js
@@ -74,6 +74,7 @@ export default {
       })
     },
     isMimeTypeAvailable (mimeType) {
+      if (mimeType === 'application/javascript;version=ECMAScript-2021') mimeType = 'application/javascript'
       return this.languages.map(l => l.contentType).includes(mimeType)
     }
   }
diff --git a/bundles/org.openhab.ui/web/src/pages/settings/rules/script/script-edit.vue b/bundles/org.openhab.ui/web/src/pages/settings/rules/script/script-edit.vue
index 1c39db5fa..f87c1a818 100644
--- a/bundles/org.openhab.ui/web/src/pages/settings/rules/script/script-edit.vue
+++ b/bundles/org.openhab.ui/web/src/pages/settings/rules/script/script-edit.vue
@@ -392,6 +392,7 @@ export default {
       })
     },
     isMimeTypeAvailable (mimeType) {
+      if (mimeType === 'application/javascript;version=ECMAScript-2021') mimeType = 'application/javascript'
       return this.languages.map(l => l.contentType).includes(mimeType)
     },
     mimeTypeDescription (mode) {