diff --git a/lib/BigNumber.js b/lib/BigNumber.js
index f53ce28..c8f3be9 100644
--- a/lib/BigNumber.js
+++ b/lib/BigNumber.js
@@ -4,7 +4,8 @@ const { jsbn: { BigInteger } } = require('node-forge');
 
 class BigNumber {
 	constructor(value = '') {
-		this._n = new BigInteger(value);
+		this._n = new BigInteger(null);
+		this._n.fromInt(value);
 	}
 
 	toBEBuffer(length = undefined) {