diff --git a/package.json b/package.json
index 08cabb2..1d76cfd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.55",
+  "version": "0.20.56",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/crypt/hashOrder.ts b/src/crypt/hashOrder.ts
index 23bc474..c62f97d 100644
--- a/src/crypt/hashOrder.ts
+++ b/src/crypt/hashOrder.ts
@@ -1,35 +1,16 @@
-import { ethers } from 'ethers';
+import { ethers, keccak256 } from 'ethers';
 import type { Order } from '../types.js';
 
-const hashOrder = (order: Order) => ethers.solidityPackedKeccak256(
-  [
-    'uint8',
-    'address',
-    'address',
-    'address',
-    'address',
-    'address',
-    'uint64',
-    'uint64',
-    'uint64',
-    'uint64',
-    'uint64',
-    'uint8',
-  ],
-  [
-    '0x03',
-    order.senderAddress,
-    order.matcherAddress,
-    order.baseAsset,
-    order.quoteAsset,
-    order.matcherFeeAsset,
-    order.amount,
-    order.price,
-    order.matcherFee,
-    order.nonce,
-    order.expiration,
-    order.buySide === 1 ? '0x01' : '0x00',
-  ],
-);
+const ORDER_TYPEHASH = "0xb5132db62dfceb466f2f8aee7a039db36a99772e5a9771d28388a5f9baad7c54"
 
-export default hashOrder;
+export default function getOrderHash(order: Order) {
+	const abiCoder = ethers.AbiCoder.defaultAbiCoder()
+
+	const { senderAddress, matcherAddress, baseAsset, quoteAsset, matcherFeeAsset, amount, price, matcherFee, nonce, expiration, buySide } = order
+	const orderBytes = abiCoder.encode(
+		["bytes32", "address", "address", "address", "address", "address", "uint64", "uint64", "uint64", "uint64", "uint64", "uint8"],
+		[ORDER_TYPEHASH, senderAddress, matcherAddress, baseAsset, quoteAsset, matcherFeeAsset, amount, price, matcherFee, nonce, expiration, buySide]
+	)
+
+	return keccak256(orderBytes)
+}
\ No newline at end of file