diff --git a/common/config/rush/pnpm-lock.yaml b/common/config/rush/pnpm-lock.yaml
index fa5472b63e..4d6b5bf717 100644
--- a/common/config/rush/pnpm-lock.yaml
+++ b/common/config/rush/pnpm-lock.yaml
@@ -1877,13 +1877,13 @@ packages:
   /@types/ws/7.4.7:
     resolution: {integrity: sha512-JQbbmxZTZehdc2iszGKs5oC3NFnjeay7mtAWrdt7qNtAVK0g19muApzAy4bm9byz79xa2ZnO/BOBC2R8RC5Lww==}
     dependencies:
-      '@types/node': 16.11.14
+      '@types/node': 17.0.0
     dev: false
 
   /@types/ws/8.2.2:
     resolution: {integrity: sha512-NOn5eIcgWLOo6qW8AcuLZ7G8PycXu0xTxxkS6Q18VWFxgPUSOwV0pBj2a/4viNZVu25i7RIB7GttdkAIUUXOOg==}
     dependencies:
-      '@types/node': 16.11.14
+      '@types/node': 17.0.0
     dev: false
 
   /@types/yargs-parser/20.2.1:
@@ -2771,6 +2771,7 @@ packages:
 
   /bindings/1.5.0:
     resolution: {integrity: sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==}
+    requiresBuild: true
     dependencies:
       file-uri-to-path: 1.0.0
     dev: false
@@ -4737,6 +4738,7 @@ packages:
 
   /file-uri-to-path/1.0.0:
     resolution: {integrity: sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==}
+    requiresBuild: true
     dev: false
     optional: true
 
@@ -6987,6 +6989,7 @@ packages:
 
   /nan/2.15.0:
     resolution: {integrity: sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ==}
+    requiresBuild: true
     dev: false
     optional: true
 
@@ -10586,7 +10589,7 @@ packages:
     dev: false
 
   file:projects/core.tgz:
-    resolution: {integrity: sha512-Xjk/aGZgRnNWYrQpTy8f2H8oQVVIvbkX6MdesJnRH7AjJTI2RtloF+8sUQMSjSahPh7thHwaYyDVlJ37vMXXNQ==, tarball: file:projects/core.tgz}
+    resolution: {integrity: sha512-1RXdycw5v+KGu+kmqXvnrKAZpNYbc0U/rInLVwKYJ17U/hED4ONAIPEaVDxp+fxgyPHpEo7AQjZe2aD87ogwtg==, tarball: file:projects/core.tgz}
     name: '@rush-temp/core'
     version: 0.0.0
     dependencies:
@@ -11265,7 +11268,7 @@ packages:
     dev: false
 
   file:projects/model-setting.tgz_typescript@4.5.4:
-    resolution: {integrity: sha512-U6P3iLbt33/iJI21fs7trAHtpwWzmI/zJn+3qyxjjnFP88i11vmbd1zfb6+GYu5muRCutqNi1pTX/5cDo+NtrA==, tarball: file:projects/model-setting.tgz}
+    resolution: {integrity: sha512-zwbVN3PDOfDeqGcL36IHQIufdePTd68yLUm83rfIg4v8+uilseid981y/BrAysmxTXAfhVYWlDmtYXvNPS4DMQ==, tarball: file:projects/model-setting.tgz}
     id: file:projects/model-setting.tgz
     name: '@rush-temp/model-setting'
     version: 0.0.0
@@ -11948,7 +11951,7 @@ packages:
     dev: false
 
   file:projects/task.tgz:
-    resolution: {integrity: sha512-H61a9iYDCDExaqx08I8pBpSZj2gDyDvF+K+R/QjML1YouYeUa1M1UPpjfz4DHwT7a67TJCasvqJ9nh0/ZNvcDw==, tarball: file:projects/task.tgz}
+    resolution: {integrity: sha512-hVBsBOFHd4nIZZipEk0yQP/C0/oQLXFcky7Q8cH37+nNFNdq4JN+MGhrfFnwWL7WzjxYEX2MW/UdiRpFszzhjA==, tarball: file:projects/task.tgz}
     name: '@rush-temp/task'
     version: 0.0.0
     dependencies:
@@ -11961,6 +11964,7 @@ packages:
       eslint-plugin-import: 2.25.3_eslint@7.32.0
       eslint-plugin-node: 11.1.0_eslint@7.32.0
       eslint-plugin-promise: 5.2.0_eslint@7.32.0
+      lexorank: 1.0.4
       prettier: 2.5.1
       typescript: 4.5.4
     transitivePeerDependencies:
@@ -12199,7 +12203,7 @@ packages:
     dev: false
 
   file:projects/view-resources.tgz_096c09b0b673a57c275d9767a12070b1:
-    resolution: {integrity: sha512-hpnFAMhZPPs+w9TmZF4XlddOrE2XwPH58k0/CJrj303Lyb8g4IDfN29B/G+sv8npFpAXUIc+w9JhV5IsMxZJJg==, tarball: file:projects/view-resources.tgz}
+    resolution: {integrity: sha512-oT79PCOUvwaL6QgjuwTNVJJqyE82WDmBx37jF5/c6SpSrYNF14+hN41rrPReKQyhhxkyrBts73IePyHxIn653Q==, tarball: file:projects/view-resources.tgz}
     id: file:projects/view-resources.tgz
     name: '@rush-temp/view-resources'
     version: 0.0.0
diff --git a/dev/generator/src/kanban.ts b/dev/generator/src/kanban.ts
index b39f3b1ffa..03557cbb71 100644
--- a/dev/generator/src/kanban.ts
+++ b/dev/generator/src/kanban.ts
@@ -1,6 +1,6 @@
 
-import { genRanks, Ref, TxOperations } from '@anticrm/core'
-import task, { DoneState, Kanban, SpaceWithStates, State } from '@anticrm/task'
+import { Ref, TxOperations } from '@anticrm/core'
+import task, { DoneState, genRanks, Kanban, SpaceWithStates, State } from '@anticrm/task'
 import { findOrUpdate } from './utils'
 
 export async function createUpdateSpaceKanban (spaceId: Ref<SpaceWithStates>, client: TxOperations): Promise<Ref<State>[]> {
diff --git a/dev/generator/src/recruit.ts b/dev/generator/src/recruit.ts
index 7a61f1fc21..e4a49a1322 100644
--- a/dev/generator/src/recruit.ts
+++ b/dev/generator/src/recruit.ts
@@ -1,7 +1,8 @@
 import contact from '@anticrm/contact'
-import core, { AttachedData, Data, generateId, genRanks, Ref, TxOperations } from '@anticrm/core'
+import core, { AttachedData, Data, generateId, Ref, TxOperations } from '@anticrm/core'
 import recruit from '@anticrm/model-recruit'
 import { Applicant, Candidate, Vacancy } from '@anticrm/recruit'
+import { genRanks } from '@anticrm/task'
 import faker from 'faker'
 import jpeg, { BufferRet } from 'jpeg-js'
 import { Client } from 'minio'
diff --git a/models/core/src/security.ts b/models/core/src/security.ts
index 99f27079ce..f91c8ab5a6 100644
--- a/models/core/src/security.ts
+++ b/models/core/src/security.ts
@@ -15,7 +15,7 @@
 
 import type { Account, Arr, Ref, Space } from '@anticrm/core'
 import { DOMAIN_MODEL } from '@anticrm/core'
-import { Implements, Model, Prop, TypeBoolean, TypeString } from '@anticrm/model'
+import { Model, Prop, TypeBoolean, TypeString } from '@anticrm/model'
 import type { IntlString } from '@anticrm/platform'
 import core from './component'
 import { TDoc } from './core'
@@ -43,8 +43,3 @@ export class TSpace extends TDoc implements Space {
 export class TAccount extends TDoc implements Account {
   email!: string
 }
-@Implements(core.interface.DocWithRank)
-export class TDocWithRank extends TDoc {
-  @Prop(TypeString(), 'Rank' as IntlString)
-  rank!: string
-}
diff --git a/models/task/src/index.ts b/models/task/src/index.ts
index 55e0f99629..5dfd9bdd2e 100644
--- a/models/task/src/index.ts
+++ b/models/task/src/index.ts
@@ -20,7 +20,7 @@ import attachment from '@anticrm/model-attachment'
 import type { Employee } from '@anticrm/contact'
 import contact from '@anticrm/contact'
 import { Arr, Class, Doc, Domain, DOMAIN_MODEL, FindOptions, Ref, Space, Timestamp } from '@anticrm/core'
-import { Builder, Collection, Mixin, Model, Prop, TypeBoolean, TypeDate, TypeRef, TypeString, UX } from '@anticrm/model'
+import { Builder, Collection, Implements, Mixin, Model, Prop, TypeBoolean, TypeDate, TypeRef, TypeString, UX } from '@anticrm/model'
 import chunter from '@anticrm/model-chunter'
 import core, { TAttachedDoc, TClass, TDoc, TSpace } from '@anticrm/model-core'
 import view from '@anticrm/model-view'
@@ -54,7 +54,7 @@ export { default } from './plugin'
 export const DOMAIN_TASK = 'task' as Domain
 export const DOMAIN_STATE = 'state' as Domain
 export const DOMAIN_KANBAN = 'kanban' as Domain
-@Model(task.class.State, core.class.Doc, DOMAIN_STATE, [core.interface.DocWithRank])
+@Model(task.class.State, core.class.Doc, DOMAIN_STATE, [task.interface.DocWithRank])
 @UX('State' as IntlString, undefined, undefined, 'title')
 export class TState extends TDoc implements State {
   @Prop(TypeString(), 'Title' as IntlString)
@@ -65,7 +65,7 @@ export class TState extends TDoc implements State {
   declare rank: string
 }
 
-@Model(task.class.DoneState, core.class.Doc, DOMAIN_STATE, [core.interface.DocWithRank])
+@Model(task.class.DoneState, core.class.Doc, DOMAIN_STATE, [task.interface.DocWithRank])
 @UX('Done' as IntlString, undefined, undefined, 'title')
 export class TDoneState extends TDoc implements DoneState {
   @Prop(TypeString(), 'Title' as IntlString)
@@ -85,7 +85,7 @@ export class TLostState extends TDoneState implements LostState {}
  *
  * No domain is specified, since pure Tasks could not exists
  */
-@Model(task.class.Task, core.class.AttachedDoc, DOMAIN_TASK, [core.interface.DocWithRank])
+@Model(task.class.Task, core.class.AttachedDoc, DOMAIN_TASK, [task.interface.DocWithRank])
 export class TTask extends TAttachedDoc implements Task {
   @Prop(TypeRef(task.class.State), 'State' as IntlString)
   state!: Ref<State>
@@ -168,7 +168,7 @@ export class TKanbanTemplateSpace extends TSpace implements KanbanTemplateSpace
   icon!: AnyComponent
 }
 
-@Model(task.class.StateTemplate, core.class.AttachedDoc, DOMAIN_KANBAN, [core.interface.DocWithRank])
+@Model(task.class.StateTemplate, core.class.AttachedDoc, DOMAIN_KANBAN, [task.interface.DocWithRank])
 export class TStateTemplate extends TAttachedDoc implements StateTemplate {
   @Prop(TypeString(), 'Title' as IntlString)
   title!: string
@@ -179,7 +179,7 @@ export class TStateTemplate extends TAttachedDoc implements StateTemplate {
   declare rank: string
 }
 
-@Model(task.class.DoneStateTemplate, core.class.AttachedDoc, DOMAIN_KANBAN, [core.interface.DocWithRank])
+@Model(task.class.DoneStateTemplate, core.class.AttachedDoc, DOMAIN_KANBAN, [task.interface.DocWithRank])
 export class TDoneStateTemplate extends TAttachedDoc implements DoneStateTemplate {
   @Prop(TypeString(), 'Title' as IntlString)
   title!: string
@@ -211,8 +211,15 @@ export class TSequence extends TDoc implements Sequence {
   sequence!: number
 }
 
+@Implements(task.interface.DocWithRank)
+export class TDocWithRank extends TDoc {
+  @Prop(TypeString(), 'Rank' as IntlString)
+  rank!: string
+}
+
 export function createModel (builder: Builder): void {
   builder.createModel(
+    TDocWithRank,
     TState,
     TDoneState,
     TWonState,
diff --git a/models/task/src/migration.ts b/models/task/src/migration.ts
index 5b699bfade..a1cbfbf955 100644
--- a/models/task/src/migration.ts
+++ b/models/task/src/migration.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 //
 
-import { AttachedDoc, Class, Client, Doc, DocWithRank, Domain, DOMAIN_TX, genRanks, Ref, Space, TxCUD, TxOperations } from '@anticrm/core'
+import { AttachedDoc, Class, Client, Doc, Domain, DOMAIN_TX, Ref, Space, TxCUD, TxOperations } from '@anticrm/core'
 import {
   MigrateOperation,
   MigrateUpdate,
@@ -22,7 +22,7 @@ import {
   MigrationUpgradeClient
 } from '@anticrm/model'
 import core from '@anticrm/model-core'
-import { createProjectKanban, KanbanTemplate } from '@anticrm/task'
+import { createProjectKanban, DocWithRank, genRanks, KanbanTemplate } from '@anticrm/task'
 import { DOMAIN_TASK, DOMAIN_STATE, DOMAIN_KANBAN } from '.'
 import task from './plugin'
 
diff --git a/packages/core/package.json b/packages/core/package.json
index 013f9edc38..b01ec98392 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -29,7 +29,6 @@
   },
   "dependencies": {
     "@anticrm/platform": "~0.6.5",
-    "just-clone": "^3.2.1",
-    "lexorank": "~1.0.4"
+    "just-clone": "^3.2.1"
   }
 }
diff --git a/packages/core/src/classes.ts b/packages/core/src/classes.ts
index 0f68d35b74..0b976db7c1 100644
--- a/packages/core/src/classes.ts
+++ b/packages/core/src/classes.ts
@@ -220,10 +220,3 @@ export interface Space extends Doc {
 export interface Account extends Doc {
   email: string
 }
-
-/**
- * @public
- */
-export interface DocWithRank extends Doc {
-  rank: string
-}
diff --git a/packages/core/src/component.ts b/packages/core/src/component.ts
index 1383c5796b..39deef8015 100644
--- a/packages/core/src/component.ts
+++ b/packages/core/src/component.ts
@@ -14,7 +14,7 @@
 //
 import type { Plugin, StatusCode } from '@anticrm/platform'
 import { plugin } from '@anticrm/platform'
-import type { Account, ArrOf, AnyAttribute, AttachedDoc, DocWithRank, Class, Doc, Interface, Obj, PropertyType, Ref, Space, Timestamp, Type, Collection, RefTo } from './classes'
+import type { Account, ArrOf, AnyAttribute, AttachedDoc, Class, Doc, Interface, Obj, PropertyType, Ref, Space, Timestamp, Type, Collection, RefTo } from './classes'
 import type { Tx, TxBulkWrite, TxCollectionCUD, TxCreateDoc, TxCUD, TxMixin, TxPutBag, TxRemoveDoc, TxUpdateDoc } from './tx'
 
 /**
@@ -50,9 +50,6 @@ export default plugin(coreId, {
     Collection: '' as Ref<Class<Collection<AttachedDoc>>>,
     Bag: '' as Ref<Class<Type<Record<string, PropertyType>>>>
   },
-  interface: {
-    DocWithRank: '' as Ref<Interface<DocWithRank>>
-  },
   space: {
     Tx: '' as Ref<Space>,
     Model: '' as Ref<Space>
diff --git a/packages/core/src/utils.ts b/packages/core/src/utils.ts
index a4728b379b..eb6b3825eb 100644
--- a/packages/core/src/utils.ts
+++ b/packages/core/src/utils.ts
@@ -13,9 +13,6 @@
 // limitations under the License.
 //
 
-import { LexoRank, LexoDecimal, LexoNumeralSystem36 } from 'lexorank'
-import LexoRankBucket from 'lexorank/lib/lexoRank/lexoRankBucket'
-
 import type { Doc, Ref, Account } from './classes'
 
 function toHex (value: number, chars: number): string {
@@ -62,30 +59,3 @@ export function getCurrentAccount (): Account { return currentAccount }
 export function setCurrentAccount (account: Account): void {
   currentAccount = account
 }
-
-/**
- * @public
- */
-export const genRanks = (count: number): Generator<string, void, unknown> =>
-  (function * () {
-    const sys = new LexoNumeralSystem36()
-    const base = 36
-    const max = base ** 6
-    const gap = LexoDecimal.parse(Math.trunc(max / (count + 2)).toString(base), sys)
-    let cur = LexoDecimal.parse('0', sys)
-
-    for (let i = 0; i < count; i++) {
-      cur = cur.add(gap)
-      yield new LexoRank(LexoRankBucket.BUCKET_0, cur).toString()
-    }
-  })()
-
-/**
- * @public
- */
-export const calcRank = (prev?: { rank: string }, next?: { rank: string }): string => {
-  const a = prev?.rank !== undefined ? LexoRank.parse(prev.rank) : LexoRank.min()
-  const b = next?.rank !== undefined ? LexoRank.parse(next.rank) : LexoRank.max()
-
-  return a.between(b).toString()
-}
diff --git a/plugins/lead-resources/src/components/CreateLead.svelte b/plugins/lead-resources/src/components/CreateLead.svelte
index 3ea90a1676..297baa7533 100644
--- a/plugins/lead-resources/src/components/CreateLead.svelte
+++ b/plugins/lead-resources/src/components/CreateLead.svelte
@@ -15,7 +15,7 @@
 -->
 <script lang="ts">
   import contact, { Contact } from '@anticrm/contact'
-  import { calcRank, Data, Ref, SortingOrder, Space } from '@anticrm/core'
+  import { Data, Ref, SortingOrder, Space } from '@anticrm/core'
   import { generateId } from '@anticrm/core'
   import { OK, Status } from '@anticrm/platform'
   import { Card, getClient, UserBox } from '@anticrm/presentation'
@@ -23,7 +23,7 @@
   import { EditBox, Grid, Status as StatusControl } from '@anticrm/ui'
   import { createEventDispatcher } from 'svelte'
   import lead from '../plugin'
-  import task from '@anticrm/task'
+  import task, { calcRank } from '@anticrm/task'
 
   export let space: Ref<Space>
 
diff --git a/plugins/lead/src/index.ts b/plugins/lead/src/index.ts
index b071c1dfae..f886dadaf8 100644
--- a/plugins/lead/src/index.ts
+++ b/plugins/lead/src/index.ts
@@ -15,10 +15,10 @@
 //
 
 import type { Contact } from '@anticrm/contact'
-import { Class, Data, Doc, genRanks, Ref, Space } from '@anticrm/core'
+import { Class, Data, Doc, Ref, Space } from '@anticrm/core'
 import type { Asset, Plugin } from '@anticrm/platform'
 import { plugin } from '@anticrm/platform'
-import task, { DoneState, Kanban, KanbanTemplateSpace, SpaceWithStates, State, Task } from '@anticrm/task'
+import task, { DoneState, Kanban, KanbanTemplateSpace, SpaceWithStates, State, Task, genRanks } from '@anticrm/task'
 
 /**
  * @public
diff --git a/plugins/recruit-resources/src/components/CreateApplication.svelte b/plugins/recruit-resources/src/components/CreateApplication.svelte
index cdbc7b4a73..57251f757a 100644
--- a/plugins/recruit-resources/src/components/CreateApplication.svelte
+++ b/plugins/recruit-resources/src/components/CreateApplication.svelte
@@ -16,11 +16,10 @@
   import type { Employee } from '@anticrm/contact'
   import contact from '@anticrm/contact'
   import { Account, Class, Client, Doc, generateId, Ref, SortingOrder } from '@anticrm/core'
-  import { calcRank } from '@anticrm/core'
   import { getResource, OK, Resource, Severity, Status } from '@anticrm/platform'
   import { Card, getClient, UserBox } from '@anticrm/presentation'
   import type { Applicant, Candidate } from '@anticrm/recruit'
-  import type { SpaceWithStates, State } from '@anticrm/task'
+  import { calcRank, SpaceWithStates, State } from '@anticrm/task'
   import task from '@anticrm/task'
   import { Grid, Status as StatusControl } from '@anticrm/ui'
   import { createEventDispatcher } from 'svelte'
diff --git a/plugins/task-resources/src/components/CreateTask.svelte b/plugins/task-resources/src/components/CreateTask.svelte
index d194e1880a..c16896f408 100644
--- a/plugins/task-resources/src/components/CreateTask.svelte
+++ b/plugins/task-resources/src/components/CreateTask.svelte
@@ -14,11 +14,11 @@
 -->
 <script lang="ts">
   import contact, { Employee } from '@anticrm/contact'
-  import { AttachedData, calcRank, Data, Doc, Ref, SortingOrder, Space } from '@anticrm/core'
+  import { AttachedData, Data, Doc, Ref, SortingOrder, Space } from '@anticrm/core'
   import { generateId } from '@anticrm/core'
   import { OK, Status } from '@anticrm/platform'
   import { Card, getClient, UserBox } from '@anticrm/presentation'
-  import { Issue, State } from '@anticrm/task'
+  import { calcRank, Issue, State } from '@anticrm/task'
   import { EditBox, Grid, Status as StatusControl } from '@anticrm/ui'
   import { createEventDispatcher } from 'svelte'
   import task from '../plugin'
diff --git a/plugins/task-resources/src/components/kanban/KanbanEditor.svelte b/plugins/task-resources/src/components/kanban/KanbanEditor.svelte
index d348d2979d..aaa4ba6cbf 100644
--- a/plugins/task-resources/src/components/kanban/KanbanEditor.svelte
+++ b/plugins/task-resources/src/components/kanban/KanbanEditor.svelte
@@ -14,10 +14,10 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { Ref, Doc, SortingOrder, calcRank } from '@anticrm/core'
+  import { Ref, SortingOrder } from '@anticrm/core'
   import { createQuery, getClient } from '@anticrm/presentation'
   import type { Kanban, State, DoneState } from '@anticrm/task'
-  import task from '@anticrm/task'
+  import task, { calcRank } from '@anticrm/task'
 
   import StatesEditor from '../state/StatesEditor.svelte'
 
diff --git a/plugins/task-resources/src/components/kanban/KanbanTemplateEditor.svelte b/plugins/task-resources/src/components/kanban/KanbanTemplateEditor.svelte
index 1d3633735c..0a465beba9 100644
--- a/plugins/task-resources/src/components/kanban/KanbanTemplateEditor.svelte
+++ b/plugins/task-resources/src/components/kanban/KanbanTemplateEditor.svelte
@@ -15,11 +15,11 @@
 -->
 <script lang="ts">
   import { createEventDispatcher } from 'svelte'
-  import { Ref, Space, SortingOrder, calcRank } from '@anticrm/core'
+  import { Ref, Space, SortingOrder } from '@anticrm/core'
   import core from '@anticrm/core'
   import { createQuery, getClient } from '@anticrm/presentation'
   import type { State, DoneStateTemplate, KanbanTemplate, StateTemplate } from '@anticrm/task'
-  import task from '@anticrm/task'
+  import task, { calcRank } from '@anticrm/task'
 
   import StatesEditor from '../state/StatesEditor.svelte'
 
diff --git a/plugins/task-resources/src/components/kanban/KanbanView.svelte b/plugins/task-resources/src/components/kanban/KanbanView.svelte
index 433f33cf26..9aa37b148a 100644
--- a/plugins/task-resources/src/components/kanban/KanbanView.svelte
+++ b/plugins/task-resources/src/components/kanban/KanbanView.svelte
@@ -15,12 +15,12 @@
 -->
 
 <script lang="ts">
-  import { AttachedDoc, calcRank, Class, Doc, DocumentUpdate, DocWithRank, FindOptions, Ref, SortingOrder } from '@anticrm/core'
+  import { AttachedDoc, Class, Doc, DocumentUpdate, FindOptions, Ref, SortingOrder } from '@anticrm/core'
   import core from '@anticrm/core'
   import { getResource } from '@anticrm/platform'
   import { createQuery, getClient } from '@anticrm/presentation'
-  import type { Kanban, SpaceWithStates, State, Task } from '@anticrm/task'
-  import task, { DoneState, LostState, WonState } from '@anticrm/task'
+  import type { Kanban, SpaceWithStates, State } from '@anticrm/task'
+  import task, { DoneState, LostState, WonState, DocWithRank, calcRank } from '@anticrm/task'
   import type { AnySvelteComponent } from '@anticrm/ui'
   import { AnyComponent, Loading, ScrollBox } from '@anticrm/ui'
   import KanbanPanel from './KanbanPanel.svelte'
diff --git a/plugins/task/package.json b/plugins/task/package.json
index 24947d731f..3f99fa0bfe 100644
--- a/plugins/task/package.json
+++ b/plugins/task/package.json
@@ -30,6 +30,7 @@
     "@anticrm/core": "~0.6.11",
     "@anticrm/contact": "~0.6.2",
     "@anticrm/view": "~0.6.0",
-    "@anticrm/ui": "~0.6.0"
+    "@anticrm/ui": "~0.6.0",
+    "lexorank": "~1.0.4"
   }
 }
diff --git a/plugins/task/src/index.ts b/plugins/task/src/index.ts
index 947b705b24..aa3c3043ba 100644
--- a/plugins/task/src/index.ts
+++ b/plugins/task/src/index.ts
@@ -14,12 +14,21 @@
 //
 
 import type { Employee } from '@anticrm/contact'
-import { AttachedDoc, Class, Client, Data, Doc, DocWithRank, genRanks, Mixin, Ref, Space, Timestamp, TxOperations } from '@anticrm/core'
+import { AttachedDoc, Class, Client, Data, Doc, Interface, Mixin, Ref, Space, Timestamp, TxOperations } from '@anticrm/core'
 import type { Asset, Plugin } from '@anticrm/platform'
 import { plugin } from '@anticrm/platform'
 import type { AnyComponent } from '@anticrm/ui'
 import { ViewletDescriptor } from '@anticrm/view'
 
+import { genRanks } from './utils'
+
+/**
+ * @public
+ */
+export interface DocWithRank extends Doc {
+  rank: string
+}
+
 // S T A T E
 
 /**
@@ -163,6 +172,9 @@ const task = plugin(taskId, {
   mixin: {
     KanbanCard: '' as Ref<Mixin<KanbanCard>>
   },
+  interface: {
+    DocWithRank: '' as Ref<Interface<DocWithRank>>
+  },
   class: {
     Issue: '' as Ref<Class<Issue>>,
     Project: '' as Ref<Class<Project>>,
@@ -332,3 +344,5 @@ export async function createKanban (client: Client & TxOperations, attachedTo: R
     attachedTo
   })
 }
+
+export * from './utils'
diff --git a/plugins/task/src/utils.ts b/plugins/task/src/utils.ts
new file mode 100644
index 0000000000..ae91f408bb
--- /dev/null
+++ b/plugins/task/src/utils.ts
@@ -0,0 +1,44 @@
+//
+// Copyright © 2020, 2021 Anticrm Platform Contributors.
+//
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License. You may
+// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import { LexoRank, LexoDecimal, LexoNumeralSystem36 } from 'lexorank'
+import LexoRankBucket from 'lexorank/lib/lexoRank/lexoRankBucket'
+
+/**
+ * @public
+ */
+export const genRanks = (count: number): Generator<string, void, unknown> =>
+  (function * () {
+    const sys = new LexoNumeralSystem36()
+    const base = 36
+    const max = base ** 6
+    const gap = LexoDecimal.parse(Math.trunc(max / (count + 2)).toString(base), sys)
+    let cur = LexoDecimal.parse('0', sys)
+
+    for (let i = 0; i < count; i++) {
+      cur = cur.add(gap)
+      yield new LexoRank(LexoRankBucket.BUCKET_0, cur).toString()
+    }
+  })()
+
+/**
+ * @public
+ */
+export const calcRank = (prev?: { rank: string }, next?: { rank: string }): string => {
+  const a = prev?.rank !== undefined ? LexoRank.parse(prev.rank) : LexoRank.min()
+  const b = next?.rank !== undefined ? LexoRank.parse(next.rank) : LexoRank.max()
+
+  return a.between(b).toString()
+}
diff --git a/plugins/view-resources/src/components/Move.svelte b/plugins/view-resources/src/components/Move.svelte
index 28c933dc82..d39caf6b8b 100644
--- a/plugins/view-resources/src/components/Move.svelte
+++ b/plugins/view-resources/src/components/Move.svelte
@@ -17,11 +17,11 @@
   import { Label, Button, Status as StatusControl } from '@anticrm/ui'
   import { getClient } from '@anticrm/presentation'
 
-  import core, { AttachedDoc, Collection, Doc, Ref, Space, SortingOrder, calcRank, Client, Class } from '@anticrm/core'
+  import core, { AttachedDoc, Collection, Doc, Ref, Space, SortingOrder, Client, Class } from '@anticrm/core'
   import { SpaceSelect } from '@anticrm/presentation'
   import { createEventDispatcher } from 'svelte'
   import view from '../plugin'
-  import task, { Task } from '@anticrm/task'
+  import task, { Task, calcRank } from '@anticrm/task'
   import { getResource, OK, Resource, Status, translate } from '@anticrm/platform'
 
   export let object: Doc