diff --git a/lib/stack/bulkOperation/index.js b/lib/stack/bulkOperation/index.js
index 8534d99a..53f8f5e9 100644
--- a/lib/stack/bulkOperation/index.js
+++ b/lib/stack/bulkOperation/index.js
@@ -27,6 +27,24 @@ export function BulkOperation (http, data = {}) {
     }
   };
 
+  this.updateItems = async ({ data, bulk_version = "" }) => {
+    this.urlPath = `/bulk/release/update_items`;
+    const headers = {
+      headers: {
+        ...cloneDeep(this.stackHeaders),
+      },
+    };
+    if (bulk_version) headers.headers.bulk_version = bulk_version;
+    try {
+      const response = await http.put(this.urlPath, data, headers);
+      if (response.data) {
+        return response.data;
+      }
+    } catch (error) {
+      console.error(error);
+    }
+  };
+
   this.jobStatus = async ({ job_id, bulk_version = "" }) => {
     this.urlPath = `/bulk/jobs/${job_id}`;
     const headers = {
diff --git a/lib/stack/release/items/index.js b/lib/stack/release/items/index.js
index b8cd65db..8556c1f2 100644
--- a/lib/stack/release/items/index.js
+++ b/lib/stack/release/items/index.js
@@ -166,7 +166,10 @@ export function ReleaseItem (http, data = {}) {
             ...cloneDeep(param)
           }
         } || {}
-
+        if (param.release_version) {
+          headers.headers['release_version'] = param.release_version;
+          delete headers.params.release_version;
+        }
         const response = await http.get(this.urlPath, headers)
         if (response.data) {
           return new ContentstackCollection(response, http, this.stackHeaders, ReleaseItemCollection)
@@ -177,6 +180,25 @@ export function ReleaseItem (http, data = {}) {
         error(err) 
       }
     }
+
+    this.move = async ({ param, release_version = '' }) => {
+      const headers = {
+        headers: {
+          ...cloneDeep(this.stackHeaders)
+        }
+      } || {}
+      if (release_version) {
+        headers.headers['release_version'] = release_version;
+      }
+      try {
+        const response = await http.put(`${this.urlPath}/move`, param, headers)
+        if (response.data) {
+          return response.data
+        }
+      } catch (err) {
+        throw error(err)
+      }
+    }
   }
   return this
 }
diff --git a/test/sanity-check/api/release-test.js b/test/sanity-check/api/release-test.js
index 5d5e7684..a77f6615 100644
--- a/test/sanity-check/api/release-test.js
+++ b/test/sanity-check/api/release-test.js
@@ -1,6 +1,6 @@
 import { describe, it, setup } from 'mocha'
 import { jsonReader } from '../utility/fileOperations/readwrite.js'
-import { releaseCreate } from '../mock/release.js'
+import { releaseCreate, releaseCreate2 } from '../mock/release.js'
 import { expect } from 'chai'
 import { cloneDeep } from 'lodash'
 import { contentstackClient } from '../utility/ContentstackClient.js'
@@ -11,6 +11,7 @@ dotenv.config()
 let client = {}
 let releaseUID = ''
 let releaseUID2 = ''
+let releaseUID3 = ''
 let entries = {}
 const itemToDelete = {}
 const jobId = ''
@@ -35,6 +36,19 @@ describe('Relases api Test', () => {
       .catch(done)
   })
 
+  it('should create a Release 2', done => {
+    makeRelease()
+      .create(releaseCreate2)
+      .then((release) => {
+        releaseUID2 = release.uid
+        expect(release.name).to.be.equal(releaseCreate2.release.name)
+        expect(release.description).to.be.equal(releaseCreate2.release.description)
+        expect(release.uid).to.be.not.equal(null)
+        done()
+      })
+      .catch(done)
+  })
+
   it('should fetch a Release from Uid', done => {
     makeRelease(releaseUID)
       .fetch()
@@ -101,7 +115,7 @@ describe('Relases api Test', () => {
   it('should fetch a Release items from Uid', done => {
     makeRelease(releaseUID)
       .item()
-      .findAll()
+      .findAll({release_version: '2.0'})
       .then((collection) => {
         const itemdelete = collection.items[0]
         itemToDelete['version'] = itemdelete.version
@@ -115,6 +129,26 @@ describe('Relases api Test', () => {
       .catch(done)
   })
 
+  it('should move release items from release1 to release2', done => {
+    const data = {
+      release_uid: releaseUID2,
+      items: [
+       { 
+          uid: entries[1].uid,
+          locale: 'en-us'
+        }
+      ]
+    }
+    makeRelease(releaseUID)
+      .item()
+      .move({ param: data, release_version: '2.0' })
+      .then((release) => {
+        expect(release.notice).to.be.equal('Release items moved successfully!')
+        done()
+      })
+      .catch(done)
+  })
+
   it('should delete specific item', done => {
     makeRelease(releaseUID)
       .item()
@@ -205,7 +239,7 @@ describe('Relases api Test', () => {
     makeRelease(releaseUID)
       .clone({ name: 'New Clone Name', description: 'New Desc' })
       .then((release) => {
-        releaseUID2 = release.uid
+        releaseUID3 = release.uid
         expect(release.name).to.be.equal('New Clone Name')
         expect(release.description).to.be.equal('New Desc')
         expect(release.uid).to.be.not.equal(null)
@@ -257,6 +291,25 @@ describe('Relases api Test', () => {
     .catch(done)
   })
 
+  it('Bulk Operation: should update items to a release', done => {
+    const items = {
+      release: releaseUID,
+      action: 'publish',
+      locale: ['en-us'],
+      reference: true,
+      items: [
+        '$all'
+      ],
+    }
+    doBulkOperation().updateItems({ data: items, bulk_version: '2.0' })
+    .then((response) => {
+      expect(response.notice).to.equal('Your update release items to latest version request is in progress.')
+      expect(response.job_id).to.not.equal(undefined)
+      done()
+    })
+    .catch(done)
+  })
+
   it('should delete specific Releases with Uid ', done => {
     makeRelease(releaseUID)
       .delete()
@@ -267,7 +320,7 @@ describe('Relases api Test', () => {
       .catch(done)
   })
 
-  it('should delete cloned Release with Uid', done => {
+  it('should delete specific Releases with Uid 2', done => {
     makeRelease(releaseUID2)
       .delete()
       .then((data) => {
@@ -276,6 +329,16 @@ describe('Relases api Test', () => {
       })
       .catch(done)
   })
+
+  it('should delete cloned Release with Uid', done => {
+    makeRelease(releaseUID3)
+      .delete()
+      .then((data) => {
+        expect(data.notice).to.be.equal('Release deleted successfully.')
+        done()
+      })
+      .catch(done)
+  })
 })
 
 function makeRelease (uid = null) {
diff --git a/test/sanity-check/mock/release.js b/test/sanity-check/mock/release.js
index 9bb45e77..58ed92b8 100644
--- a/test/sanity-check/mock/release.js
+++ b/test/sanity-check/mock/release.js
@@ -7,4 +7,13 @@ const releaseCreate = {
   }
 }
 
-export { releaseCreate }
+const releaseCreate2 = {
+  release: {
+    name: 'Second release',
+    description: 'Adding release date 2020-21-07',
+    locked: false,
+    archived: false
+  }
+}
+
+export { releaseCreate, releaseCreate2 }
diff --git a/test/unit/bulkOperation-test.js b/test/unit/bulkOperation-test.js
index 89fa9a01..e0324146 100644
--- a/test/unit/bulkOperation-test.js
+++ b/test/unit/bulkOperation-test.js
@@ -31,14 +31,14 @@ describe('Contentstack BulkOperation test', () => {
 
   it('should add items to a release', async () => {
     const items = {
-      release: 'blt05e951e5f3a1d342',
+      release: 'release_uid',
       action: 'publish',
       locale: ['en-us'],
       reference: true,
       items: [
         {
           content_type_uid: 'ct_1',
-          uid: 'bltf6e197a18a11ec5f',
+          uid: 'entry_uid',
           version: 2,
           locale: 'en-us',
           title: 'validation test',
@@ -57,6 +57,28 @@ describe('Contentstack BulkOperation test', () => {
     expect(response.job_id).to.not.equal(undefined);
   });
 
+  it('should update items to a release', async () => {
+    const items = {
+      release: 'release_uid',
+      action: 'publish',
+      locale: ['en-us'],
+      reference: true,
+      items: [
+        '$all'
+      ],
+    };
+
+    var mock = new MockAdapter(Axios);
+    mock.onPut('/bulk/release/update_items').reply(200, {
+      notice: 'Your update release items to latest version request is in progress.',
+      job_id: 'job_id',
+    });
+
+    const response = await makeBulkOperation().updateItems({ data: items, bulk_version: '2.0' });
+    expect(response.notice).to.equal('Your update release items to latest version request is in progress.');
+    expect(response.job_id).to.not.equal(undefined);
+  });
+
   it('should publish items in bulk', async () => {
     const publishDetails = {
       entries: [
diff --git a/test/unit/release-test.js b/test/unit/release-test.js
index 4cc3d6b8..06f17f67 100644
--- a/test/unit/release-test.js
+++ b/test/unit/release-test.js
@@ -221,6 +221,26 @@ describe('Contentstack Release test', () => {
       })
       .catch(done)
   })
+
+  it('Release move test', done => {
+    var mock = new MockAdapter(Axios)
+    mock.onPut('/releases/UID/items/move').reply(200, {
+      ...noticeMock
+    })
+    makeRelease({
+      release: {
+        ...systemUidMock
+      },
+      stackHeaders: stackHeadersMock
+    })
+    .item()
+      .move({ data: { release_uid: 'UID2', items: ['$all'] }, release_version: '2.0' })
+      .then((response) => {
+        expect(response.notice).to.be.equal(noticeMock.notice)
+        done()
+      })
+      .catch(done)
+  })
 })
 
 function makeRelease (data) {
diff --git a/types/stack/bulkOperation/index.d.ts b/types/stack/bulkOperation/index.d.ts
index 6f1dd731..4a997e15 100644
--- a/types/stack/bulkOperation/index.d.ts
+++ b/types/stack/bulkOperation/index.d.ts
@@ -7,7 +7,7 @@ export interface BulkOperation extends SystemFields {
     unpublish(config: BulkOperationConfig): Promise<Response>
     delete(config: BulkDeleteConfig): Promise<Response>
     addItems(config: AddItemsConfig): Promise<Response>
-
+    updateItems(config: AddItemsConfig): Promise<Response>
     jobStatus(config: BulkJobStatus): Promise<Response>
 }
 export interface BulkOperationConfig {
diff --git a/types/stack/release/index.d.ts b/types/stack/release/index.d.ts
index 0982c189..00516a58 100644
--- a/types/stack/release/index.d.ts
+++ b/types/stack/release/index.d.ts
@@ -32,6 +32,7 @@ export interface ReleaseDeploy extends AnyProperty {
 export interface ReleaseItem extends SystemFields, Creatable<Release, { item?: ReleaseItemData; items?: Array<ReleaseItemData> }> {
     delete(param?: { items: Array<ReleaseItemData> }): Promise<void>; // Changed return type to Promise<void>
     findAll(param?: AnyProperty): Promise<ContentstackCollection<ReleaseItemData>>;
+    move(param: { param: MoveReleaseItems, release_version?: string }): Promise<any>;
 }
 
 // Data structure for Release item properties
@@ -42,3 +43,14 @@ export interface ReleaseItemData extends AnyProperty {
     content_type_uid: string;
     action: 'publish' | 'unpublish';
 }
+
+export interface MoveReleaseItems extends AnyProperty {
+    release_uid: string;
+    items: Array<ReleaseItemData>;
+}
+
+export interface MoveItemData extends AnyProperty {
+    uid: string;
+    locale: string;
+    variant_id?: string;
+}