diff --git a/composer-dependency-analyser.php b/composer-dependency-analyser.php
index ed055cdd..16ffc06c 100644
--- a/composer-dependency-analyser.php
+++ b/composer-dependency-analyser.php
@@ -7,4 +7,5 @@
 
 return $config
     ->addPathToScan(__DIR__ . '/bin/deptrac', isDev: false)
+    ->ignoreErrorsOnExtension('ext-dom', [ErrorType::SHADOW_DEPENDENCY])
     ->ignoreErrorsOnPath(__DIR__ . '/tests', [ErrorType::UNKNOWN_CLASS, ErrorType::UNKNOWN_FUNCTION]); // keep ability to test invalid symbols