diff --git a/models/contact/package.json b/models/contact/package.json
index 51fc94cac1..cdab99018b 100644
--- a/models/contact/package.json
+++ b/models/contact/package.json
@@ -26,6 +26,7 @@
   },
   "dependencies": {
     "@anticrm/model-core": "~0.6.0",
+    "@anticrm/model-chunter": "~0.6.0",
     "@anticrm/model-workbench": "~0.6.0",
     "@anticrm/model-attachment": "~0.6.0",
     "@anticrm/model-view": "~0.6.0",
diff --git a/models/lead/src/index.ts b/models/lead/src/index.ts
index 6753c96a26..140625ea2b 100644
--- a/models/lead/src/index.ts
+++ b/models/lead/src/index.ts
@@ -19,7 +19,7 @@ import type { Contact } from '@anticrm/contact'
 import type { Doc, FindOptions, Ref } from '@anticrm/core'
 import type { Funnel, Lead } from '@anticrm/lead'
 import { createKanban } from '@anticrm/lead'
-import { Builder, Model, Prop, TypeRef, TypeString, UX } from '@anticrm/model'
+import { Builder, Collection, Model, Prop, TypeRef, TypeString, UX } from '@anticrm/model'
 import attachment from '@anticrm/model-attachment'
 import chunter from '@anticrm/model-chunter'
 import contact from '@anticrm/model-contact'
@@ -44,10 +44,10 @@ export class TLead extends TTask implements Lead {
   @Prop(TypeRef(contact.class.Contact), lead.string.Customer)
   customer!: Ref<Contact>
 
-  @Prop(TypeString(), 'Comments' as IntlString)
+  @Prop(Collection(chunter.class.Comment), 'Comments' as IntlString)
   comments?: number
 
-  @Prop(TypeString(), 'Attachments' as IntlString)
+  @Prop(Collection(attachment.class.Attachment), 'Attachments' as IntlString)
   attachments?: number
 }
 
diff --git a/models/recruit/src/index.ts b/models/recruit/src/index.ts
index 18602a406b..8dc507243a 100644
--- a/models/recruit/src/index.ts
+++ b/models/recruit/src/index.ts
@@ -33,7 +33,7 @@ export class TVacancy extends TSpaceWithStates implements Vacancy {
   @Prop(TypeString(), 'Full description' as IntlString)
   fullDescription?: string
 
-  @Prop(TypeString(), 'Attachments' as IntlString)
+  @Prop(Collection(attachment.class.Attachment), 'Attachments' as IntlString)
   attachments?: number
 
   @Prop(TypeDate(), 'Due date' as IntlString, recruit.icon.Calendar)
@@ -76,10 +76,10 @@ export class TApplicant extends TTask implements Applicant {
   @Prop(TypeRef(recruit.class.Candidate), 'Candidate' as IntlString)
   declare attachedTo: Ref<Candidate>
 
-  @Prop(TypeString(), 'Attachments' as IntlString)
+  @Prop(Collection(attachment.class.Attachment), 'Attachments' as IntlString)
   attachments?: number
 
-  @Prop(TypeString(), 'Comments' as IntlString)
+  @Prop(Collection(chunter.class.Comment), 'Comments' as IntlString)
   comments?: number
 
   @Prop(TypeRef(contact.class.Employee), 'Assigned recruiter' as IntlString)
diff --git a/models/task/src/index.ts b/models/task/src/index.ts
index 166338a7df..543b68b1fc 100644
--- a/models/task/src/index.ts
+++ b/models/task/src/index.ts
@@ -97,10 +97,10 @@ export class TIssue extends TTask implements Issue {
   @Prop(TypeString(), 'Description' as IntlString)
   description!: string
 
-  @Prop(TypeString(), 'Comments' as IntlString)
+  @Prop(Collection(chunter.class.Comment), 'Comments' as IntlString)
   comments!: number
 
-  @Prop(TypeString(), 'Attachments' as IntlString)
+  @Prop(Collection(attachment.class.Attachment), 'Attachments' as IntlString)
   attachments!: number
 
   @Prop(TypeString(), 'Labels' as IntlString)