diff --git a/src/TypedProperty.php b/src/TypedProperty.php
index 471ac87..b0e64a9 100644
--- a/src/TypedProperty.php
+++ b/src/TypedProperty.php
@@ -155,6 +155,19 @@ public function to_array() {
             ) {
                 $output[$key] = $value->to_array();
             } else {
+                if (is_array($value)) {
+                    foreach ($value as $k => $v) {
+                        if (
+                            is_object($v) &&
+                            (
+                                $v instanceof TypedProperty ||
+                                $v instanceof TypedArray
+                            )
+                        ) {
+                            $value[$k] = $v->to_array();
+                        }
+                    }
+                }
                 $output[$key] = $value;
             }
         }
diff --git a/tests/ExampleTypedProperty.php b/tests/ExampleTypedProperty.php
index 58fdb1d..315d85b 100644
--- a/tests/ExampleTypedProperty.php
+++ b/tests/ExampleTypedProperty.php
@@ -34,13 +34,32 @@ class ExampleTypedProperty extends TypedProperty {
     protected $parent;
 
     protected const CONSTRAINTS = [
-        'name'      => ['type' => 'string'],
-        'hire_date' => ['type' => '\DealNews\TypedObjects\Tests\ExampleTypedSubProperty'],
-        'parent'    => ['type' => '\DealNews\TypedObjects\Tests\ExampleTypedProperty'],
-        'position'  => ['type' => 'string'],
-        'array_a'   => ['type' => 'array'],
-        'boolean_a' => ['type' => 'boolean'],
-        'float_a'   => ['type' => 'double'],
-        'int_a'     => ['type' => 'integer'],
+        'name'      => [
+            'type' => 'string'
+        ],
+        'hire_date' => [
+            'type' => '\DealNews\TypedObjects\Tests\ExampleTypedSubProperty'
+        ],
+        'parent'    => [
+            'type' => '\DealNews\TypedObjects\Tests\ExampleTypedProperty'
+        ],
+        'position'  => [
+            'type' => 'string'
+        ],
+        'array_a'   => [
+            'type' => 'array',
+            'constraint' => [
+                'type' => '\DealNews\TypedObjects\Tests\ExampleTypedSubProperty'
+            ]
+        ],
+        'boolean_a' => [
+            'type' => 'boolean'
+        ],
+        'float_a'   => [
+            'type' => 'double'
+        ],
+        'int_a'     => [
+            'type' => 'integer'
+        ],
     ];
 }
diff --git a/tests/TypedPropertyTest.php b/tests/TypedPropertyTest.php
index b2a9397..ec2412a 100644
--- a/tests/TypedPropertyTest.php
+++ b/tests/TypedPropertyTest.php
@@ -97,6 +97,8 @@ public function testToArray() {
         $hire_date->date   = '1997-01-01';
         $object->hire_date = $hire_date;
 
+        $object->array_a   = [$hire_date];
+
         $expected = [
             'name'      => 'test',
             'hire_date' =>
@@ -106,7 +108,13 @@ public function testToArray() {
                     'daylight_savings_time' => null,
                 ],
             'position'  => null,
-            'array_a'   => null,
+            'array_a'   => [
+                [
+                    'time'                  => null,
+                    'date'                  => '1997-01-01',
+                    'daylight_savings_time' => null,
+                ],
+            ],
             'boolean_a' => null,
             'float_a'   => null,
             'int_a'     => null,