diff --git a/src/lib/delegation/crypto.ts b/src/lib/delegation/crypto.ts
index 52df0de..7a4461e 100644
--- a/src/lib/delegation/crypto.ts
+++ b/src/lib/delegation/crypto.ts
@@ -25,7 +25,8 @@ export class DelegationCrypto {
     expiryTimestamp: number,
     nonce: string
   ): string {
-    return `I, ${walletAddress}, authorize browser key ${browserPublicKey} until ${expiryTimestamp} (nonce: ${nonce})`;
+    const expiryDate = new Date(expiryTimestamp).toLocaleString();
+    return `I, ${walletAddress}, authorize browser key ${browserPublicKey} until ${expiryDate} (nonce: ${nonce})`;
   }
 
   /**
diff --git a/src/lib/forum/__tests__/relevance.test.ts b/src/lib/forum/__tests__/relevance.test.ts
index 0c188a6..e7c8643 100644
--- a/src/lib/forum/__tests__/relevance.test.ts
+++ b/src/lib/forum/__tests__/relevance.test.ts
@@ -11,9 +11,9 @@ import { expect, describe, beforeEach, it } from 'vitest';
 
 // Mock delegation proof for tests
 const mockDelegationProof: DelegationProof = {
-  authMessage: 'I authorize browser key: test-key until 9999999999',
+  authMessage: 'I, test-address, authorize browser key test-key until 20/11/2286, 11:16:39 pm (nonce: test-nonce)',
   walletSignature: 'mock-signature',
-  expiryTimestamp: 9999999999,
+  expiryTimestamp: 9999999999999,
   walletAddress: 'test-address',
   walletType: 'ethereum',
 };