diff --git a/composer.json b/composer.json
index ceb996a..1f208fe 100644
--- a/composer.json
+++ b/composer.json
@@ -17,9 +17,7 @@
         "psr/simple-cache": "^3.0",
         "symfony/console": "^6.3|^7.0",
         "symfony/finder": "^6.3|^7.0",
-        "symfony/process": "^6.3|^7.0",
-        "symfony/property-access": "^6.3|^7.0",
-        "symfony/serializer": "^6.3|^7.0"
+        "symfony/process": "^6.3|^7.0"
     },
     "config": {
         "optimize-autoloader": true,
diff --git a/src/Pkl.php b/src/Pkl.php
index 5016fd9..6ecb271 100644
--- a/src/Pkl.php
+++ b/src/Pkl.php
@@ -15,11 +15,6 @@
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 use Symfony\Component\Process\Process;
-use Symfony\Component\Serializer\Encoder\JsonEncoder;
-use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
-use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
-use Symfony\Component\Serializer\Normalizer\PropertyNormalizer;
-use Symfony\Component\Serializer\Serializer;
 
 /**
  * This is the main class to interact
@@ -82,14 +77,13 @@ public static function eval(string $module, string $toClass = PklModule::class):
             }
         }
 
-        $serializer = new Serializer([
-            new GetSetMethodNormalizer(),
-            new ObjectNormalizer(),
-            new PropertyNormalizer(),
-        ], [new JsonEncoder()]);
-
         /** @var PklModule $module */
-        $module = $serializer->deserialize($entry->content, PklModule::class, 'json');
+        $decoded = \json_decode($entry->content, true);
+        $module = new PklModule();
+        foreach ($decoded as $key => $value) {
+            $module->__set($key, $value);
+        }
+
         if ($toClass === PklModule::class) {
             return $module;
         }
diff --git a/tests/PklTest.php b/tests/PklTest.php
index 4d6e755..2adf6fb 100644
--- a/tests/PklTest.php
+++ b/tests/PklTest.php
@@ -95,6 +95,10 @@ public function testEvalWithCustomClass(): void
         $this->assertInstanceOf(User::class, $user);
         $this->assertSame(1, $user->id);
         $this->assertSame('John Doe', $user->name);
+        $this->assertSame('123 Main St', $user->address->street);
+        $this->assertSame('Springfield', $user->address->city);
+        $this->assertSame('IL', $user->address->state);
+        $this->assertSame('62701', $user->address->zip);
     }
 
     /**