diff --git a/package.json b/package.json
index a19c455..9d645e4 100644
--- a/package.json
+++ b/package.json
@@ -22,8 +22,8 @@
     "lib/"
   ],
   "devDependencies": {
-    "chai": "^4.3.7",
-    "chai-as-promised": "^7.1.1",
+    "@rvagg/chai-as-promised": "^8.0.1",
+    "chai": "^5.0.0",
     "desm": "^1.3.0",
     "mocha": "^10.1.0",
     "nock": "^13.2.9"
diff --git a/tests/buyer.spec.js b/tests/buyer.spec.js
index 509341c..ee8235c 100644
--- a/tests/buyer.spec.js
+++ b/tests/buyer.spec.js
@@ -2,8 +2,7 @@
 
 import xml2js from 'xml2js'
 const parser = new xml2js.Parser()
-import chai from 'chai'
-const expect = chai.expect
+import { expect } from 'chai'
 
 import {Buyer} from '../index.js'
 import {createBuyer} from './resources/setup.js'
diff --git a/tests/client.spec.js b/tests/client.spec.js
index 03c2597..bde0806 100644
--- a/tests/client.spec.js
+++ b/tests/client.spec.js
@@ -1,10 +1,9 @@
 /* eslint-env mocha */
 
 import nock from 'nock'
-import chai from 'chai'
-import chaiAsPromised from 'chai-as-promised'
-const expect = chai.expect
-chai.use(chaiAsPromised)
+import {expect, use as chaiUse} from 'chai'
+import chaiAsPromised from '@rvagg/chai-as-promised'
+chaiUse(chaiAsPromised)
 
 import {Buyer, Client, Invoice, Item, Seller} from '../index.js'
 import {
diff --git a/tests/invoice.spec.js b/tests/invoice.spec.js
index e575583..30fac93 100644
--- a/tests/invoice.spec.js
+++ b/tests/invoice.spec.js
@@ -2,8 +2,7 @@
 
 import xml2js from 'xml2js'
 const parser = new xml2js.Parser()
-import chai from 'chai'
-const expect = chai.expect
+import {expect} from 'chai'
 
 import {Buyer, Invoice, Item, Seller} from '../index.js'
 import {createSeller, createBuyer, createSoldItemNet, createSoldItemGross, createInvoice} from './resources/setup.js'
diff --git a/tests/item.spec.js b/tests/item.spec.js
index f2a4cdd..bebc347 100644
--- a/tests/item.spec.js
+++ b/tests/item.spec.js
@@ -2,8 +2,7 @@
 
 import xml2js from 'xml2js'
 const parser = new xml2js.Parser()
-import chai from 'chai'
-const expect = chai.expect
+import {expect} from 'chai'
 
 import {Buyer, Invoice, Item, Seller} from '../index.js'
 import {createSeller, createBuyer, createSoldItemNet, createSoldItemGross, createInvoice} from './resources/setup.js'
diff --git a/tests/seller.spec.js b/tests/seller.spec.js
index 37d5319..8722c57 100644
--- a/tests/seller.spec.js
+++ b/tests/seller.spec.js
@@ -2,8 +2,7 @@
 
 import xml2js from 'xml2js'
 const parser = new xml2js.Parser()
-import chai from 'chai'
-const expect = chai.expect
+import {expect} from 'chai'
 
 import {Seller} from '../index.js'
 import {createSeller} from './resources/setup.js'