diff --git a/app/Http/Requests/Auth/UpdateSelfRequest.php b/app/Http/Requests/Auth/UpdateSelfRequest.php
index 6cfa64b..b5e146d 100644
--- a/app/Http/Requests/Auth/UpdateSelfRequest.php
+++ b/app/Http/Requests/Auth/UpdateSelfRequest.php
@@ -24,6 +24,10 @@ class UpdateSelfRequest extends FormRequest
                 'sometimes', 'required', 'email', 'max:191',
                 Rule::unique('users', 'email')->whereNull('deleted_at')->ignore($userId),
             ],
+            'phone' => [
+                'sometimes', 'nullable', 'string', 'max:20',
+                Rule::unique('users', 'phone')->whereNull('deleted_at')->ignore($userId),
+            ],
             'preferred_language' => ['sometimes', 'string', 'in:en,tl,ceb'],
             'avatar_path' => ['sometimes', 'nullable', 'string', 'max:255'],
             'fcm_token' => ['sometimes', 'nullable', 'string', 'max:255'],