diff --git a/app/Models/Category.php b/app/Models/Category.php
index 4493f25..2649a9a 100644
--- a/app/Models/Category.php
+++ b/app/Models/Category.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Builder;
@@ -14,7 +16,6 @@ use Illuminate\Database\Eloquent\Model;
  */
 class Category extends Model
 {
-    // use HasFactory;
 
     protected $guarded = [];
     protected $casts = [
@@ -26,7 +27,7 @@ class Category extends Model
         'visible' => 'boolean'
     ];
 
-    public function scopeVisibled(Builder $builder)
+    public function scopeVisibled(Builder $builder): Builder
     {
         return $builder->where(function (Builder $query) {
             $query->where('visible', true)
diff --git a/app/Models/Project.php b/app/Models/Project.php
index 97f8d81..5444361 100644
--- a/app/Models/Project.php
+++ b/app/Models/Project.php
@@ -23,10 +23,7 @@ use Illuminate\Database\Eloquent\Builder;
 class Project extends Model
 {
 
-    // use HasFactory;
-
     protected $dateFormat = 'Y-m-d';
-
     protected $guarded = [];
     protected $casts = [
         'id' => 'integer',
@@ -65,7 +62,7 @@ class Project extends Model
             $this->attributes['update_date'] = null;
     }
 
-    public function scopeVisibled(Builder $builder)
+    public function scopeVisibled(Builder $builder): Builder
     {
         return $builder->where('visible', true);
     }
diff --git a/app/Models/User.php b/app/Models/User.php
index 2c90892..cbc6c4b 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;