diff --git a/src/methods/findById.ts b/src/methods/findById.ts
index 1ac9c09..49ea9e3 100644
--- a/src/methods/findById.ts
+++ b/src/methods/findById.ts
@@ -5,7 +5,7 @@ import { getURL, getAvatars } from '../utils';
 
 export interface IProfile {
   profileId: UUID;
-  userId: UUID;
+  userId: UUID | null;
   idOnPlatform: UUID | string;
   platformType: PlatformAllExtended;
   nameOnPlatform: string;
diff --git a/src/methods/findByUsername.ts b/src/methods/findByUsername.ts
index 95d6804..799fecf 100644
--- a/src/methods/findByUsername.ts
+++ b/src/methods/findByUsername.ts
@@ -5,7 +5,7 @@ import { getURL, getAvatars } from '../utils';
 
 export interface IProfile {
   profileId: UUID;
-  userId: UUID;
+  userId: UUID | null;
   idOnPlatform: UUID | string;
   platformType: PlatformAll;
   nameOnPlatform: string;
diff --git a/src/utils.ts b/src/utils.ts
index 5fb7633..121c51e 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -13,10 +13,10 @@ import {
   STATS_CATEGORIES, GITHUB_ASSETS_URL
 } from './constants';
 
-export const getAvatarURL = (id: UUID, size = 256) =>
+export const getAvatarURL = (id: UUID | null, size = 256) =>
   `${AVATARS_URL}/${id}/default_${size === 500 ? 'tall' : `${size}_${size}`}.png`;
 
-export const getAvatars = (id: UUID) => ({
+export const getAvatars = (id: UUID | null) => ({
   146: getAvatarURL(id, 146), 256: getAvatarURL(id, 256), 500: getAvatarURL(id, 500)
 });