diff --git a/etc/di.xml b/etc/di.xml
index 510ccf3..f88c724 100644
--- a/etc/di.xml
+++ b/etc/di.xml
@@ -1,5 +1,6 @@
-<config>
+<?xml version="1.0"?>
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
     <type name="Magento\Framework\AppInterface">
         <plugin name="graycoreCorsLauncher" type="Graycore\Cors\Plugin\FastLauncher"/>
     </type>
-</config>
\ No newline at end of file
+</config>