diff --git a/app/Http/Requests/RegisterRequest.php b/app/Http/Requests/RegisterRequest.php
index 0bc1a92..a38c1da 100644
--- a/app/Http/Requests/RegisterRequest.php
+++ b/app/Http/Requests/RegisterRequest.php
@@ -28,7 +28,14 @@ class RegisterRequest extends FormRequest
     {
         return [
 
-            'name' => ['required', 'string', 'max:255'],
+            'name' => [
+                'required',
+                'string',
+                'min:3',
+                'max:32',
+                'regex:/^[a-zA-Z0-9_.-]+$/',
+                'unique:users,name',
+            ],
             'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
             'password' => ['required', 'string', 'min:8'],
             'avatar' => ['sometimes', 'nullable', 'image', 'max:2048'],
diff --git a/app/Http/Requests/UpdateUserRequest.php b/app/Http/Requests/UpdateUserRequest.php
index 34ae76e..a2ce50c 100644
--- a/app/Http/Requests/UpdateUserRequest.php
+++ b/app/Http/Requests/UpdateUserRequest.php
@@ -19,7 +19,6 @@ class UpdateUserRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'name' => ['sometimes', 'string', 'max:255'],
             'bio' => ['sometimes', 'nullable', 'string'],
             'height' => ['sometimes', 'nullable', 'integer'],
             'avatar' => ['sometimes', 'nullable', 'image', 'max:2048'],
diff --git a/database/migrations/2026_05_21_140559_change_name_to_unique.php b/database/migrations/2026_05_21_140559_change_name_to_unique.php
new file mode 100644
index 0000000..ccd4254
--- /dev/null
+++ b/database/migrations/2026_05_21_140559_change_name_to_unique.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->unique('name');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropUnique(['name']);
+        });
+    }
+};