diff --git a/app/Models/ProductionPlan.php b/app/Models/ProductionPlan.php
index 56ca38c..ddc7af7 100644
--- a/app/Models/ProductionPlan.php
+++ b/app/Models/ProductionPlan.php
@@ -12,12 +12,15 @@ class ProductionPlan extends Model
 
     protected $fillable = [
         "plant_id",
+        "item_id",
         "shift_id",
         "created_at",
         "line_id",
         "plan_quantity",
         "production_quantity",
         "operator_id",
+        "working_days",
+        "leave_dates",
     ];
 
     public function plant(): BelongsTo
@@ -34,4 +37,9 @@ class ProductionPlan extends Model
     {
         return $this->belongsTo(Line::class);
     }
+
+    public function item(): BelongsTo
+    {
+        return $this->belongsTo(Item::class);
+    }
 }