diff --git a/package.json b/package.json
index 6e24548f..12dab469 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "echojs-lib",
-	"version": "1.8.1-rc.2",
+	"version": "1.8.1-rc.3",
 	"description": "Pure JavaScript ECHO library for node.js",
 	"main": "./dist/index.js",
 	"types": "./types/index.d.ts",
diff --git a/src/echo/transaction.js b/src/echo/transaction.js
index 0a2e4438..5803fa24 100644
--- a/src/echo/transaction.js
+++ b/src/echo/transaction.js
@@ -257,7 +257,7 @@ class Transaction {
 	 * @returns {Promise<{ publicKeys:Array<string> }>}
 	 */
 	async getPotentialSignatures() {
-		const transactionObject = this.finalized ? this.transactionObject : transaction.toObject({
+		const transactionObject = this.finalized ? this.transactionObject : transaction.toRaw({
 			ref_block_num: 0,
 			ref_block_prefix: 0,
 			expiration: this.expiration === undefined ? 0 : this.expiration,