diff --git a/milvus/const/milvus.ts b/milvus/const/milvus.ts
index 977101ef..f0b73aca 100644
--- a/milvus/const/milvus.ts
+++ b/milvus/const/milvus.ts
@@ -150,6 +150,8 @@ export enum IndexType {
   STL_SORT = 'STL_SORT',
   TRIE = 'Trie',
   INVERTED = 'INVERTED',
+  // 2.5
+  BITMAP = 'BITMAP',
 }
 
 // MsgType
diff --git a/milvus/types/Common.ts b/milvus/types/Common.ts
index 05f8a7db..08b839c8 100644
--- a/milvus/types/Common.ts
+++ b/milvus/types/Common.ts
@@ -58,7 +58,10 @@ export interface TimeStampArray {
   created_utc_timestamps: string[];
 }
 
-export type keyValueObj = Record<string, string | number | string[] | number[]>;
+export type keyValueObj = Record<
+  string,
+  string | number | string[] | number[] | boolean
+>;
 
 export interface collectionNameReq extends GrpcTimeOut {
   collection_name: string; // required, collection name
diff --git a/test/grpc/Index.spec.ts b/test/grpc/Index.spec.ts
index 83e0e593..c420ba8b 100644
--- a/test/grpc/Index.spec.ts
+++ b/test/grpc/Index.spec.ts
@@ -14,7 +14,7 @@ import {
 } from '../tools';
 import { timeoutTest } from '../tools';
 
-const milvusClient = new MilvusClient({ address: IP });
+const milvusClient = new MilvusClient({ address: IP, logLevel: 'info' });
 // names
 const COLLECTION_NAME = GENERATE_NAME();
 const COLLECTION_NAME_WITHOUT_INDEX_NAME = GENERATE_NAME();
@@ -271,6 +271,16 @@ describe(`Milvus Index API`, () => {
     expect(res.error_code).toEqual(ErrorCode.SUCCESS);
   });
 
+  it(`Create Bitmap index on int32_array array should success`, async () => {
+    const res = await milvusClient.createIndex({
+      index_name: 'bitmap_index',
+      collection_name: COLLECTION_NAME,
+      field_name: 'int32_array',
+      index_type: IndexType.BITMAP,
+    });
+    expect(res.error_code).toEqual(ErrorCode.SUCCESS);
+  });
+
   it(`Create Index without name should success`, async () => {
     const res = await milvusClient.createIndex({
       collection_name: COLLECTION_NAME_WITHOUT_INDEX_NAME,