diff --git a/packages/common/src/interfaces/nostr-relay-options.interface.ts b/packages/common/src/interfaces/nostr-relay-options.interface.ts
index 79a334aa..14ab518d 100644
--- a/packages/common/src/interfaces/nostr-relay-options.interface.ts
+++ b/packages/common/src/interfaces/nostr-relay-options.interface.ts
@@ -5,9 +5,16 @@ import { Logger } from './logger.interface';
  * Options for NostrRelay
  */
 export type NostrRelayOptions = {
+  /**
+   * Hostname of the Nostr Relay server. If not set, NIP-42 is not enabled.
+   * More info: https://github.com/nostr-protocol/nips/blob/master/42.md
+   */
+  hostname?: string;
   /**
    * Domain name of the Nostr Relay server. If not set, NIP-42 is not enabled.
    * More info: https://github.com/nostr-protocol/nips/blob/master/42.md
+   *
+   * @deprecated Use hostname instead
    */
   domain?: string;
   /**
diff --git a/packages/core/__test__/nostr-relay.spec.ts b/packages/core/__test__/nostr-relay.spec.ts
index 0bc24516..7db83e5f 100644
--- a/packages/core/__test__/nostr-relay.spec.ts
+++ b/packages/core/__test__/nostr-relay.spec.ts
@@ -19,7 +19,7 @@ describe('NostrRelay', () => {
 
   beforeEach(() => {
     nostrRelay = new NostrRelay({} as EventRepository, {
-      domain: 'test',
+      hostname: 'test',
     });
 
     client = {
@@ -118,7 +118,7 @@ describe('NostrRelay', () => {
 
     it('should not cache handle result', async () => {
       const nostrRelayWithoutCache = new NostrRelay({} as EventRepository, {
-        domain: 'test',
+        hostname: 'test',
         eventHandlingResultCacheTtl: 0,
       });
       const event = { id: 'eventId' } as Event;
@@ -253,20 +253,20 @@ describe('NostrRelay', () => {
     });
 
     it('should handle req successfully if NIP-42 is not enabled and filter contains encrypted direct message kind', async () => {
-      const nostrRelayWithoutDomain = new NostrRelay({} as EventRepository);
+      const nostrRelayWithoutHostname = new NostrRelay({} as EventRepository);
       const subscriptionId: SubscriptionId = 'subscriptionId';
       const filters: Filter[] = [{ kinds: [4] }];
       const events = [{ id: 'a', kind: 4 }] as Event[];
-      const ctx = nostrRelayWithoutDomain['getClientContext'](client);
+      const ctx = nostrRelayWithoutHostname['getClientContext'](client);
 
       const mockSubscribe = jest
-        .spyOn(nostrRelayWithoutDomain['subscriptionService'], 'subscribe')
+        .spyOn(nostrRelayWithoutHostname['subscriptionService'], 'subscribe')
         .mockImplementation();
       const mockFind = jest
-        .spyOn(nostrRelayWithoutDomain['eventService'], 'find')
+        .spyOn(nostrRelayWithoutHostname['eventService'], 'find')
         .mockResolvedValue(events);
 
-      const result = await nostrRelayWithoutDomain.handleReqMessage(
+      const result = await nostrRelayWithoutHostname.handleReqMessage(
         client,
         subscriptionId,
         filters,
@@ -330,11 +330,11 @@ describe('NostrRelay', () => {
       );
     });
 
-    it('should return directly if domain is not set', async () => {
-      const nostrRelayWithoutDomain = new NostrRelay({} as EventRepository);
+    it('should return directly if hostname is not set', async () => {
+      const nostrRelayWithoutHostname = new NostrRelay({} as EventRepository);
       const signedEvent = { id: 'eventId' } as Event;
 
-      nostrRelayWithoutDomain.handleAuthMessage(client, signedEvent);
+      nostrRelayWithoutHostname.handleAuthMessage(client, signedEvent);
 
       expect(client.send).toHaveBeenCalledWith(
         JSON.stringify([MessageType.OK, signedEvent.id, true, '']),
@@ -405,10 +405,10 @@ describe('NostrRelay', () => {
   });
 
   describe('isAuthorized', () => {
-    it('should return true if domain is not set', () => {
-      const nostrRelayWithoutDomain = new NostrRelay({} as EventRepository);
+    it('should return true if hostname is not set', () => {
+      const nostrRelayWithoutHostname = new NostrRelay({} as EventRepository);
 
-      expect(nostrRelayWithoutDomain.isAuthorized(client)).toBeTruthy();
+      expect(nostrRelayWithoutHostname.isAuthorized(client)).toBeTruthy();
     });
 
     it('should return false if client is not authenticated', () => {
diff --git a/packages/core/src/nostr-relay.ts b/packages/core/src/nostr-relay.ts
index 0ac7bbe1..8205ac69 100644
--- a/packages/core/src/nostr-relay.ts
+++ b/packages/core/src/nostr-relay.ts
@@ -42,7 +42,7 @@ export class NostrRelay {
   private readonly eventHandlingLazyCache:
     | LazyCache<EventId, Promise<HandleEventResult>>
     | undefined;
-  private readonly domain?: string;
+  private readonly hostname?: string;
   private readonly pluginManagerService: PluginManagerService;
 
   private readonly clientContexts = new Map<Client, ClientContext>();
@@ -59,6 +59,9 @@ export class NostrRelay {
   ) {
     this.options = options;
 
+    // if hostname is not set, it means that NIP-42 is not enabled
+    this.hostname = options.hostname ?? options.domain;
+
     const logger = options.logger ?? new ConsoleLoggerService();
     logger.setLogLevel(options.logLevel ?? LogLevel.INFO);
 
@@ -66,7 +69,7 @@ export class NostrRelay {
     this.subscriptionService = new SubscriptionService(
       this.clientContexts,
       logger,
-      !!options.domain,
+      !!this.hostname,
     );
     this.eventService = new EventService(
       eventRepository,
@@ -89,9 +92,6 @@ export class NostrRelay {
         ttl: options.eventHandlingResultCacheTtl,
       });
     }
-
-    // if domain is not set, it means that NIP-42 is not enabled
-    this.domain = options.domain;
   }
 
   /**
@@ -112,7 +112,7 @@ export class NostrRelay {
    */
   handleConnection(client: Client): void {
     const ctx = this.getClientContext(client);
-    if (this.domain) {
+    if (this.hostname) {
       ctx.sendMessage(createOutgoingAuthMessage(ctx.id));
     }
   }
@@ -283,7 +283,7 @@ export class NostrRelay {
     signedEvent: Event,
   ): HandleAuthMessageResult {
     const ctx = this.getClientContext(client);
-    if (!this.domain) {
+    if (!this.hostname) {
       ctx.sendMessage(createOutgoingOkMessage(signedEvent.id, true));
       return { success: true };
     }
@@ -291,7 +291,7 @@ export class NostrRelay {
     const validateErrorMsg = EventUtils.isSignedEventValid(
       signedEvent,
       ctx.id,
-      this.domain,
+      this.hostname,
     );
     if (validateErrorMsg) {
       ctx.sendMessage(
@@ -312,7 +312,7 @@ export class NostrRelay {
    * @param client Client instance, usually a WebSocket
    */
   isAuthorized(client: Client): boolean {
-    return this.domain ? !!this.getClientContext(client).pubkey : true;
+    return this.hostname ? !!this.getClientContext(client).pubkey : true;
   }
 
   /**
@@ -363,7 +363,7 @@ export class NostrRelay {
   ): Promise<Event[]> {
     const events: Event[] = [];
     if (
-      this.domain &&
+      this.hostname &&
       filters.some(filter =>
         FilterUtils.hasEncryptedDirectMessageKind(filter),
       ) &&
@@ -375,7 +375,7 @@ export class NostrRelay {
     }
 
     (await this.eventService.find(filters)).forEach(event => {
-      if (this.domain && !EventUtils.checkPermission(event, pubkey)) {
+      if (this.hostname && !EventUtils.checkPermission(event, pubkey)) {
         return;
       }
       events.push(event);