diff --git a/rdf_entity.install b/rdf_entity.install
index c17bbfd0..b2780443 100644
--- a/rdf_entity.install
+++ b/rdf_entity.install
@@ -103,6 +103,8 @@ function rdf_entity_update_8004() {
   $extensions_config = $config_factory->get('core.extension');
   /** @var \Drupal\Core\File\FileSystemInterface $file_system */
   $file_system = \Drupal::service('file_system');
+  /** @var \Drupal\Core\Extension\ExtensionPathResolver $extension_path_resolver */
+  $extension_path_resolver = \Drupal::service('extension.path.resolver');
   foreach (['mapping', 'graph'] as $type) {
     // Install the new entity type definitions.
     $entity_type = $entity_type_manager->getDefinition("sparql_$type");
@@ -118,7 +120,7 @@ function rdf_entity_update_8004() {
     foreach (['module', 'theme'] as $extension_type) {
       $extensions = array_keys($extensions_config->get($extension_type));
       foreach ($extensions as $extension_name) {
-        $extension_path = drupal_get_path($extension_type, $extension_name);
+        $extension_path = $extension_path_resolver->getPath($extension_type, $extension_name);
         foreach (['install', 'optional'] as $sub_path) {
           try {
             foreach ($file_system->scanDirectory("$extension_path/config/$sub_path", $file_pattern) as $path => $file) {