diff --git a/packages/useink/src/core/contracts/call.ts b/packages/useink/src/core/contracts/call.ts
index 380abe8..134a050 100644
--- a/packages/useink/src/core/contracts/call.ts
+++ b/packages/useink/src/core/contracts/call.ts
@@ -1,3 +1,4 @@
+import { BN } from '../../utils/index.ts';
 import {
   AbiMessage,
   AccountId,
@@ -7,7 +8,6 @@ import {
   DecodedContractResult,
 } from '../types/index';
 import { decodeCallResult } from './decodeCallResult.ts';
-import { BN } from '@polkadot/util';
 
 export async function call<T>(
   contract: ContractPromise,
diff --git a/packages/useink/src/core/contracts/toContractAbiMessage.ts b/packages/useink/src/core/contracts/toContractAbiMessage.ts
index c98ea7d..5aeb9b0 100644
--- a/packages/useink/src/core/contracts/toContractAbiMessage.ts
+++ b/packages/useink/src/core/contracts/toContractAbiMessage.ts
@@ -1,5 +1,4 @@
-import { AbiMessage, Result } from '../types/index';
-import { ContractPromise } from '@polkadot/api-contract';
+import { AbiMessage, ContractPromise, Result } from '../types/index';
 
 export const toContractAbiMessage = (
   contract: ContractPromise,