diff --git a/lib/Signer.js b/lib/Signer.js
index 21cccfc..8db089b 100644
--- a/lib/Signer.js
+++ b/lib/Signer.js
@@ -3,7 +3,7 @@
 const crypto = require('crypto');
 
 const { DOMParser, XMLSerializer } = require('xmldom');
-const select = require('xpath.js');
+const xpath = require('xpath');
 const C14n = require('xml-crypto/lib/c14n-canonicalization').C14nCanonicalization;
 
 
@@ -72,7 +72,7 @@ module.exports = class Signer {
 
 		// canonicalize the node that has authenticate='true' attribute
 		// const contentToDigest = select(this.doc, '//*[@authenticate="true"]')
-		const contentToDigest = select(this.doc, "//*[@authenticate='true']")
+		const contentToDigest = xpath.select("//*[@authenticate='true']", this.doc)
 			.map(x => new C14n().process(x)).join('');
 
 		console.log('digest', 'contentToDigest', contentToDigest);
@@ -88,7 +88,8 @@ module.exports = class Signer {
 
 		console.log('sign =>');
 		if (nodeSignatureValue) {
-			const contentToSign = (new C14n().process(select(this.doc, '//ds:SignedInfo')[0])).replace('xmlns:ds="http://www.w3.org/2000/09/xmldsig#"', 'xmlns="urn:org:ebics:H004" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"');
+			const select = xpath.useNamespaces({ ds: 'http://www.w3.org/2000/09/xmldsig#' });
+			const contentToSign = (new C14n().process(select('//ds:SignedInfo', this.doc)[0])).replace('xmlns:ds="http://www.w3.org/2000/09/xmldsig#"', 'xmlns="urn:org:ebics:H004" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"');
 
 			nodeSignatureValue.textContent = this.client.x().key.sign(contentToSign, 'base64');
 		}
diff --git a/package.json b/package.json
index 927344a..dd27479 100644
--- a/package.json
+++ b/package.json
@@ -25,11 +25,9 @@
 		"moment": "^2.22.1",
 		"node-rsa": "^0.4.2",
 		"request": "^2.87.0",
-		"xml-c14n": "0.0.6",
 		"xml-crypto": "^0.10.1",
 		"xmldom": "^0.1.27",
-		"xpath": "0.0.27",
-		"xpath.js": "^1.1.0"
+		"xpath": "0.0.27"
 	},
 	"devDependencies": {
 		"eslint": "^4.19.1",