diff --git a/plugins/calendar-resources/src/components/EditEvent.svelte b/plugins/calendar-resources/src/components/EditEvent.svelte
index 6d08ab340d..303d88af13 100644
--- a/plugins/calendar-resources/src/components/EditEvent.svelte
+++ b/plugins/calendar-resources/src/components/EditEvent.svelte
@@ -47,8 +47,8 @@
 
   let rules: RecurringRule[] = (object as ReccuringEvent).rules ?? []
 
-  let participants: Ref<Person>[] = object.participants
-  let externalParticipants: string[] = object.externalParticipants ?? []
+  let participants: Ref<Person>[] = [...object.participants]
+  let externalParticipants: string[] = [...(object.externalParticipants ?? [])]
 
   const dispatch = createEventDispatcher()
   const client = getClient()
@@ -80,6 +80,12 @@
         update.dueDate = allDay ? saveUTC(dueDate) : dueDate
       }
     }
+    if (deepEqual(object.participants, participants) === false) {
+      update.participants = participants
+    }
+    if (deepEqual(object.externalParticipants, externalParticipants) === false) {
+      update.externalParticipants = externalParticipants
+    }
     if (deepEqual(object.reminders, reminders) === false) {
       update.reminders = reminders
     }
diff --git a/plugins/calendar-resources/src/plugin.ts b/plugins/calendar-resources/src/plugin.ts
index b4a558a7cd..daec11861c 100644
--- a/plugins/calendar-resources/src/plugin.ts
+++ b/plugins/calendar-resources/src/plugin.ts
@@ -18,10 +18,6 @@ import { IntlString, mergeIds } from '@hcengineering/platform'
 import { AnyComponent } from '@hcengineering/ui'
 
 export default mergeIds(calendarId, calendar, {
-  component: {
-    CreateEvent: '' as AnyComponent,
-    EditEvent: '' as AnyComponent
-  },
   activity: {
     ReminderViewlet: '' as AnyComponent
   },
diff --git a/plugins/calendar/src/index.ts b/plugins/calendar/src/index.ts
index 7789aeb12e..4bc1e9757e 100644
--- a/plugins/calendar/src/index.ts
+++ b/plugins/calendar/src/index.ts
@@ -144,6 +144,8 @@ const calendarPlugin = plugin(calendarId, {
     Calendar: '' as Ref<Doc>
   },
   component: {
+    CreateEvent: '' as AnyComponent,
+    EditEvent: '' as AnyComponent,
     CalendarView: '' as AnyComponent,
     PersonsPresenter: '' as AnyComponent,
     Events: '' as AnyComponent,