diff --git a/src/Entities/District.php b/src/Entities/District.php
index 4b34d15..ddcc1f8 100644
--- a/src/Entities/District.php
+++ b/src/Entities/District.php
@@ -75,7 +75,7 @@ public function getDistrictsWithMunicipalities()
     public function getDistrictsByProvince($provinceId)
     {
          return array_values(array_filter($this->items, function ($item) use ($provinceId) {
-             return ($item->province_id == $provinceId);
+             return property_exists($item, 'province_id') && ($item->province_id == $provinceId);
          }));
     }
 
diff --git a/src/Entities/Municipality.php b/src/Entities/Municipality.php
index cff2102..c00b8ad 100644
--- a/src/Entities/Municipality.php
+++ b/src/Entities/Municipality.php
@@ -59,7 +59,7 @@ public function allMunicipalities()
     public function getMunicipalitiesByDistrict($districtId)
     {
         return array_values(array_filter($this->items, function ($item) use ($districtId) {
-            return ($item->district_id == $districtId);
+            return property_exists($item, 'district_id') && ($item->district_id == $districtId);
         }));
     }
 
@@ -72,7 +72,7 @@ public function getMunicipalitiesByDistrict($districtId)
     public function getMunicipalityByCategory($categoryId)
     {
         return array_values(array_filter($this->items, function ($item) use ($categoryId) {
-            return ($item->category_id == $categoryId);
+            return property_exists($item, 'category_id') && ($item->category_id == $categoryId);
         }));
     }
 
@@ -87,7 +87,7 @@ public function getMunicipalityByProvince($provinceId)
         $district = new District();
         $districts = $district->getDistrictsByProvince($provinceId);
         $municipalities = array_map(function ($item) {
-            return $this->getMunicipalitiesByDistrict($item->id);
+            return $this->getMunicipalitiesByDistrict($item->id ?? 0);
         }, $districts);
 
         return array_merge(...$municipalities);
@@ -154,14 +154,14 @@ public function wards($id)
 
         if($this->lang == 'np'){
 
-            $totalWards = Helper::numericEnglish($municipality->wards);
+            $totalWards = Helper::numericEnglish($municipality->wards ?? 1);
 
             $wards = range(1, $totalWards);
             $wards = array_map(function ($item){
                 return Helper::numericNepali($item);
             }, $wards);
         }else{
-            $wards = range(1, $municipality->wards);
+            $wards = range(1, $municipality->wards ?? 1);
         }
         return $wards;
     }