diff --git a/package.json b/package.json
index b60a038..4cc5e1d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.42-rc9",
+  "version": "0.20.42-rc10",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/crypt/signLockOrder.ts b/src/crypt/signLockOrder.ts
index 397675f..3b1110c 100644
--- a/src/crypt/signLockOrder.ts
+++ b/src/crypt/signLockOrder.ts
@@ -4,6 +4,9 @@ import ORDER_TYPES from '../constants/orderTypes.js';
 import type { LockOrder, SignedLockOrder, SupportedChainId } from '../types.js';
 import getDomainData from './getDomainData.js';
 import generateSecret from '../utils/generateSecret';
+import { BigNumber } from 'bignumber.js';
+import normalizeNumber from '../utils/normalizeNumber';
+import { INTERNAL_PROTOCOL_PRECISION } from '../constants';
 
 const DEFAULT_EXPIRATION = 29 * 24 * 60 * 60 * 1000; // 29 days
 
@@ -13,7 +16,7 @@ export type LockOrderProps = {
   userAddress: string // адрес юзера который хочет сделать лок
   senderAddress: string // broker
   asset: string
-  amount: ethers.BigNumberish
+  amount: BigNumber.Value
   signer: ethers.Signer
   chainId: SupportedChainId
   targetChainId: SupportedChainId
@@ -38,7 +41,11 @@ export const signLockOrder = async ({
     sender: senderAddress,
     expiration,
     asset,
-    amount,
+    amount: Number(normalizeNumber(
+      amount,
+      INTERNAL_PROTOCOL_PRECISION,
+      BigNumber.ROUND_FLOOR,
+    )),
     targetChainId,
     secretHash,
   };
diff --git a/src/types.ts b/src/types.ts
index 7a6cc6b..68fe560 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -5,7 +5,6 @@ import type subOrderStatuses from './constants/subOrderStatuses.js';
 import type positionStatuses from './constants/positionStatuses.js';
 import type { knownEnvs } from './config/schemas';
 import type getHistory from './Orion/bridge/getHistory.js';
-import type { ethers } from 'ethers';
 import type { networkCodes } from './constants';
 
 export type DeepPartial<T> = T extends object ? {
@@ -59,9 +58,9 @@ export type CrossOrder = Order & {
 export type LockOrder = {
   user: string // address // адрес юзера который хочет сделать лок
   sender: string // address // broker
-  expiration: ethers.BigNumberish // uint64
+  expiration: number // uint64
   asset: string // address(?)
-  amount: ethers.BigNumberish // uint64
+  amount: number // uint64
   targetChainId: SupportedChainId // uint64
   secretHash: string // uint64
 }