diff --git a/package.json b/package.json
index 7d76dcb..28e9beb 100644
--- a/package.json
+++ b/package.json
@@ -15,8 +15,8 @@
     "multiaddr"
   ],
   "engines": {
-    "node": ">=16.0.0",
-    "npm": ">=7.0.0"
+    "node": ">=18.0.0",
+    "npm": ">=8.6.0"
   },
   "type": "module",
   "types": "./dist/src/index.d.ts",
@@ -142,8 +142,7 @@
     "@multiformats/multiaddr": "^12.0.0"
   },
   "devDependencies": {
-    "aegir": "^38.1.7",
-    "uint8arrays": "^4.0.3",
-    "util": "^0.12.3"
+    "aegir": "^39.0.6",
+    "uint8arrays": "^4.0.3"
   }
 }
diff --git a/test/index.spec.ts b/test/index.spec.ts
index 74dc511..f456151 100644
--- a/test/index.spec.ts
+++ b/test/index.spec.ts
@@ -1,6 +1,6 @@
 /* eslint-env mocha */
-import { expect } from 'aegir/chai'
 import { multiaddr } from '@multiformats/multiaddr'
+import { expect } from 'aegir/chai'
 import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
 import * as mafmt from '../src/index.js'
 import type { Mafmt } from '../src/index.js'