diff --git a/src/lib/identity/signatures/key-delegation.ts b/src/lib/identity/signatures/key-delegation.ts
index daa1393..e7dd93e 100644
--- a/src/lib/identity/signatures/key-delegation.ts
+++ b/src/lib/identity/signatures/key-delegation.ts
@@ -6,10 +6,13 @@
  */
 
 import * as ed from '@noble/ed25519';
+import { sha512 } from '@noble/hashes/sha512';
 import { bytesToHex, hexToBytes } from '@/lib/utils';
 import { LOCAL_STORAGE_KEYS } from '@/lib/waku/constants';
 import { DelegationInfo } from './types';
 
+ed.etc.sha512Sync = (...m) => sha512(ed.etc.concatBytes(...m));
+
 
 export class KeyDelegation {
   private static readonly DEFAULT_EXPIRY_HOURS = 24;