diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e428aa0..4f20698d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [4.10.3](https://github.com/nash-io/nash-protocol/compare/v4.10.1...v4.10.3) (2023-05-22)
+
 ### [4.10.1](https://github.com/nash-io/nash-protocol/compare/v4.9.9...v4.10.1) (2023-05-19)
 
 ### [4.9.9](https://github.com/nash-io/nash-protocol/compare/v4.9.7...v4.9.9) (2023-02-21)
diff --git a/package.json b/package.json
index 75261e5a..6d93ea31 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@neon-exchange/nash-protocol",
-  "version": "4.10.1",
+  "version": "4.10.3",
   "description": "TypeScript implementation of Nash crypto routines",
   "main": "build/main/index.js",
   "typings": "build/main/index.d.ts",
diff --git a/src/__tests__/signatureVectors.json b/src/__tests__/signatureVectors.json
index a5962024..6c70d0a5 100644
--- a/src/__tests__/signatureVectors.json
+++ b/src/__tests__/signatureVectors.json
@@ -205,10 +205,10 @@
       "timestamp": 1565362799120,
       "signature": "30440220083a73aaaa2b69476c74b64e0f1a1bdc1f6e5d311472729712eba8b5f3343a0a02204dcd5a5aac2693865b140c041cf85d6bd079c9a4803fe83caa218bb09d13d2c2",
       "raw": {
-        "polygon": "03FA39FDDDE46CEA3060B91F80ABED8672F77C5BEA000100000000121278900052E62CFA39FDDDE46CEA3060B91F80ABED8672F77C5BEA"
+        "polygon": "03FA39FDDDE46CEA3060B91F80ABED8672F77C5BEA000300000000121278900052E62CFA39FDDDE46CEA3060B91F80ABED8672F77C5BEA"
       },
       "blockchainSignatures": {
-        "polygon": "aea25dfbd61a2e0013e06f728d49f9bda50a135db0e2df1bdaa8101e0bc5d698f276adafdfed4d743291a8d0b97003e531c642fbdab5a88995162752aae8c06301"
+        "polygon": "e0b4e31781887a3639f24a0dee44356118f9ccc65158e7e06ef90581c7833be620ac6c6ff8906d3d0f87563c442944140b0da5ffb60d2cbfc8017a58d969bfc401"
       }
     }
   },
diff --git a/src/generateWallet/generateWallet.ts b/src/generateWallet/generateWallet.ts
index a414a689..55e5c19b 100644
--- a/src/generateWallet/generateWallet.ts
+++ b/src/generateWallet/generateWallet.ts
@@ -96,6 +96,7 @@ export function deriveIndex(extendedKey: bip32.BIP32Interface, index: number): b
 
 export const coinTypeFromString = (s: string): CoinType => {
   const m: Record<string, CoinType> = {
+    arbitrum: CoinType.ABRITRUM,
     avaxc: CoinType.AVAXC,
     bch: CoinType.BCH,
     btc: CoinType.BTC,
@@ -107,8 +108,7 @@ export const coinTypeFromString = (s: string): CoinType => {
     ltc: CoinType.LTC,
     neo: CoinType.NEO,
     neo3: CoinType.NEO3,
-    polygon: CoinType.POLYGON,
-    arbitrum: CoinType.ABRITRUM
+    polygon: CoinType.POLYGON
   }
 
   if (!(s in m)) {
diff --git a/src/mpc/generateAPIKeys.ts b/src/mpc/generateAPIKeys.ts
index b815d4b5..4641bf07 100644
--- a/src/mpc/generateAPIKeys.ts
+++ b/src/mpc/generateAPIKeys.ts
@@ -53,6 +53,13 @@ export async function generateAPIKeys(params: GenerateApiKeysParams): Promise<AP
     params.net,
     Blockchain.NEO3
   )
+  const arbitrumWallet = generateWallet(
+    masterSeed,
+    coinTypeFromString('arbitrum'),
+    params.walletIndices.arbitrum,
+    params.net,
+    Blockchain.ARBITRUM
+  )
 
   const btcSecret = btcWallet.privateKey
   const ethSecret = ethWallet.privateKey
@@ -60,6 +67,7 @@ export async function generateAPIKeys(params: GenerateApiKeysParams): Promise<AP
   const avaxcSecret = avaxcWallet.privateKey
   const polygonSecret = polygonWallet.privateKey
   const neo3Secret = neo3Wallet.privateKey
+  const arbitrumSecret = arbitrumWallet.privateKey
 
   const btc = await createAPIKey({
     ...params,
@@ -91,6 +99,12 @@ export async function generateAPIKeys(params: GenerateApiKeysParams): Promise<AP
     curve: 'Secp256r1',
     secret: neo3Secret
   })
+  const arbitrum = await createAPIKey({
+    ...params,
+    curve: 'Secp256k1',
+    secret: arbitrumSecret
+  })
+
   return {
     child_keys: {
       [BIP44.BTC]: {
@@ -128,6 +142,12 @@ export async function generateAPIKeys(params: GenerateApiKeysParams): Promise<AP
         client_secret_share: neo3.client_secret_share,
         public_key: neo3Wallet.publicKey,
         server_secret_share_encrypted: neo3.server_secret_share_encrypted
+      },
+      [BIP44.ABRITRUM]: {
+        address: arbitrumWallet.address,
+        client_secret_share: arbitrum.client_secret_share,
+        public_key: arbitrumWallet.publicKey,
+        server_secret_share_encrypted: arbitrum.server_secret_share_encrypted
       }
     },
     paillier_pk: btc.paillier_pk,
diff --git a/src/signPolygonBlockchainData/signPolygonBlockchainData.spec.ts b/src/signPolygonBlockchainData/signPolygonBlockchainData.spec.ts
index 9878f635..be283444 100644
--- a/src/signPolygonBlockchainData/signPolygonBlockchainData.spec.ts
+++ b/src/signPolygonBlockchainData/signPolygonBlockchainData.spec.ts
@@ -85,7 +85,7 @@ test('sign derc20 withdraw movement', async () => {
   expect(payloadRes.blockchainMovement).toEqual({
     address: 'fa39fddde46cea3060b91f80abed8672f77c5bea',
     amount: '303200400',
-    asset: '0001',
+    asset: '0003',
     nonce: '0052e62c',
     prefix: '03',
     userPubKey: 'fa39fddde46cea3060b91f80abed8672f77c5bea',
@@ -117,6 +117,6 @@ test('sign MATIC/DERC20 market buy order', async () => {
     orderData
   )
   expect(rawData).toBe(
-    '019BAE2051097DC5DDF68D3C01D5FA5CCC7833109D000100000000001700000005FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF00000000000000000000002A'
+    '019BAE2051097DC5DDF68D3C01D5FA5CCC7833109D000300000000001700000005FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF00000000000000000000002A'
   )
 })
diff --git a/src/types/MPC.ts b/src/types/MPC.ts
index 2299675f..0b995c13 100644
--- a/src/types/MPC.ts
+++ b/src/types/MPC.ts
@@ -91,7 +91,8 @@ export enum BIP44 {
   NEO = "m/44'/888'/0'/0/0",
   NEO3 = "m/44'/888'/1'/0/0",
   POLYGON = "m/44'/966'/0'/0/0",
-  AVAXC = "m/44'/9000'/0'/0/0"
+  AVAXC = "m/44'/9000'/0'/0/0",
+  ABRITRUM = "m/44'/9001'/0'/0/0"
 }
 
 export interface ChildKey {
@@ -115,6 +116,7 @@ export interface APIKey {
     [BIP44.AVAXC]?: ChildKey
     [BIP44.POLYGON]?: ChildKey
     [BIP44.NEO3]?: ChildKey
+    [BIP44.ABRITRUM]?: ChildKey
   }
   payload_signing_key: string
   payload_public_key: string