diff --git a/lib/saml2.coffee b/lib/saml2.coffee
index 89dd263..6ac3993 100644
--- a/lib/saml2.coffee
+++ b/lib/saml2.coffee
@@ -5,7 +5,7 @@ debug         = require('debug') 'saml2'
 {parseString} = require 'xml2js'
 url           = require 'url'
 util          = require 'util'
-xmlbuilder    = require 'xmlbuilder'
+xmlbuilder    = require 'xmlbuilder2'
 xmlcrypto     = require 'xml-crypto'
 xmldom        = require 'xmldom'
 xmlenc        = require 'xml-encryption'
@@ -28,8 +28,7 @@ class SAMLError extends Error
 # request.
 create_authn_request = (issuer, assert_endpoint, destination, force_authn, context, nameid_format) ->
   if context?
-    context_element = _(context.class_refs).map (class_ref) -> 'saml:AuthnContextClassRef': class_ref
-    context_element.push '@Comparison': context.comparison
+    context_element = { 'saml:AuthnContextClassRef': context.class_refs, '@Comparison': context.comparison }
 
   id = '_' + crypto.randomBytes(21).toString('hex')
   xml = xmlbuilder.create
diff --git a/package.json b/package.json
index 8eb3199..98ace8d 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "license": "Apache-2.0",
   "main": "index.js",
   "engines": {
-    "node": ">=0.10.x"
+    "node": ">=10.x"
   },
   "scripts": {
     "build": "coffee --bare -c -o lib-js lib",
@@ -31,13 +31,13 @@
     "nyc": "^15.0.0"
   },
   "dependencies": {
-    "async": "^2.5.0",
-    "debug": "^2.6.0",
+    "async": "^3.2.0",
+    "debug": "^4.3.0",
     "underscore": "^1.8.0",
     "xml-crypto": "^0.10.0",
     "xml-encryption": "^1.2.1",
     "xml2js": "^0.4.0",
-    "xmlbuilder": "~2.2.0",
-    "xmldom": "^0.1.0"
+    "xmlbuilder2": "^2.4.0",
+    "xmldom": "^0.4.0"
   }
 }
diff --git a/test/saml2.coffee b/test/saml2.coffee
index fef1bc4..b595339 100644
--- a/test/saml2.coffee
+++ b/test/saml2.coffee
@@ -51,7 +51,7 @@ describe 'saml2', ->
         authn_request = dom.getElementsByTagName('AuthnRequest')[0]
 
         requested_authn_context = authn_request.getElementsByTagNameNS('urn:oasis:names:tc:SAML:2.0:protocol', 'RequestedAuthnContext')[0]
-        assert _(requested_authn_context.attributes).some (attr) -> attr.name is 'Comparison' and attr.value is 'exact'
+        assert _(requested_authn_context.attributes).some((attr) -> attr.name is 'Comparison' and attr.value is 'exact'), "Could not determine if specified attribute had proper value (Comparison=exact)"
         assert.equal requested_authn_context.getElementsByTagNameNS('urn:oasis:names:tc:SAML:2.0:assertion', 'AuthnContextClassRef')[0].firstChild.data, 'context:class'