diff --git a/src/Geometry/Geometry.php b/src/Geometry/Geometry.php
index ee238eb..5d2dc08 100644
--- a/src/Geometry/Geometry.php
+++ b/src/Geometry/Geometry.php
@@ -140,8 +140,16 @@ public function jsonSerialize(): array
      */
     public function toArray(): array
     {
+        if (str_starts_with(static::class, __NAMESPACE__)) {
+            $type = class_basename(static::class);
+        } else {
+            $parents = class_parents($this);
+            $types = array_values(array_filter($parents, fn (string $cl) => str_starts_with($cl, __NAMESPACE__)));
+            $type = class_basename($types[0]);
+        }
+
         return [
-            'type' => class_basename(static::class),
+            'type' => $type,
             'coordinates' => $this->getCoordinates(),
         ];
     }
diff --git a/src/LaravelSpatialServiceProvider.php b/src/LaravelSpatialServiceProvider.php
index 684c3e9..bb4bfb6 100644
--- a/src/LaravelSpatialServiceProvider.php
+++ b/src/LaravelSpatialServiceProvider.php
@@ -74,8 +74,7 @@ private function validateConfig(): void
             }
 
             $baseClass = $type->getBaseGeometryClassName();
-            /** @phpstan-ignore-next-line  */
-            if ($configType !== $baseClass && ! $configType instanceof $baseClass) {
+            if (! is_a($configType, $baseClass, true)) {
                 throw new LaravelSpatialException(sprintf(
                     'Class for geometry type "%s" should be instance of "%s" ("%s" provided), please check config',
                     $type->value,
diff --git a/tests/Custom/CustomPointJsonTest.php b/tests/Custom/CustomPointJsonTest.php
new file mode 100644
index 0000000..911e345
--- /dev/null
+++ b/tests/Custom/CustomPointJsonTest.php
@@ -0,0 +1,22 @@
+<?php
+
+use ASanikovich\LaravelSpatial\Geometry\Point;
+use ASanikovich\LaravelSpatial\Tests\Custom\CustomPoint;
+
+it('check serialisation of custom point', function (): void {
+    $point = new CustomPoint(0, 180);
+
+    $array = $point->toArray();
+
+    expect($array)->toEqual(['type' => 'Point', 'coordinates' => [180.0, 0.0]])
+        ->and(CustomPoint::fromArray($array))->toEqual($point);
+});
+
+it('check serialisation of point', function (): void {
+    $point = new Point(0, 180);
+
+    $array = $point->toArray();
+
+    expect($array)->toEqual(['type' => 'Point', 'coordinates' => [180.0, 0.0]])
+        ->and(Point::fromArray($array))->toEqual($point);
+});
diff --git a/tests/Pest.php b/tests/Pest.php
index 98b5a95..8ce6957 100644
--- a/tests/Pest.php
+++ b/tests/Pest.php
@@ -13,6 +13,9 @@ function isSupportAxisOrder(): bool
     return (new Connection())->isSupportAxisOrder(DB::connection());
 }
 
+/**
+ * @return class-string
+ */
 function getDatabaseTruncationClass(): string
 {
     if (class_exists(DatabaseTruncation::class)) {