diff --git a/package.json b/package.json
index bcd9c2a..421be13 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,8 @@
     "@types/chai": "^4.2.8",
     "@types/mocha": "^8.0.0",
     "aegir": "^32.0.2",
-    "uint8arrays": "^2.0.5"
+    "uint8arrays": "^2.0.5",
+    "util": "^0.12.3"
   },
   "dependencies": {
     "multiaddr": "^8.0.0"