diff --git a/config/typescript-transformer.php b/config/typescript-transformer.php
index f66985b..e96476c 100644
--- a/config/typescript-transformer.php
+++ b/config/typescript-transformer.php
@@ -7,7 +7,7 @@
      */
 
     'auto_discover_types' => [
-        app_path()
+        app_path(),
     ],
 
     /*
@@ -75,4 +75,12 @@
      */
 
     'transform_to_native_enums' => false,
+
+    /*
+     * By default, this package will convert PHP nullable properties to TypeScript
+     * types using a `null` type union. Setting `transform_null_to_optional` will
+     * make them optional instead.
+     */
+
+    'transform_null_to_optional' => false,
 ];
diff --git a/src/TypeScriptTransformerServiceProvider.php b/src/TypeScriptTransformerServiceProvider.php
index 6387e04..289ceee 100644
--- a/src/TypeScriptTransformerServiceProvider.php
+++ b/src/TypeScriptTransformerServiceProvider.php
@@ -33,6 +33,7 @@ public function packageRegistered(): void
                 ->writer(config('typescript-transformer.writer', TypeDefinitionWriter::class))
                 ->formatter(config('typescript-transformer.formatter'))
                 ->transformToNativeEnums(config('typescript-transformer.transform_to_native_enums', false))
+                ->nullToOptional(config('typescript-transformer.transform_null_to_optional', false))
         );
     }
 }