diff --git a/src/Symfony/Component/AssetMapper/ImportMap/ImportMapConfigReader.php b/src/Symfony/Component/AssetMapper/ImportMap/ImportMapConfigReader.php
index cbcd8024e0d34..cbb597856f774 100644
--- a/src/Symfony/Component/AssetMapper/ImportMap/ImportMapConfigReader.php
+++ b/src/Symfony/Component/AssetMapper/ImportMap/ImportMapConfigReader.php
@@ -41,7 +41,7 @@ public function getEntries(): ImportMapEntries
 
         $entries = new ImportMapEntries();
         foreach ($importMapConfig ?? [] as $importName => $data) {
-            $validKeys = ['path', 'version', 'type', 'entrypoint', 'url', 'package_specifier'];
+            $validKeys = ['path', 'version', 'type', 'entrypoint', 'url', 'package_specifier', 'downloaded_to', 'preload'];
             if ($invalidKeys = array_diff(array_keys($data), $validKeys)) {
                 throw new \InvalidArgumentException(sprintf('The following keys are not valid for the importmap entry "%s": "%s". Valid keys are: "%s".', $importName, implode('", "', $invalidKeys), implode('", "', $validKeys)));
             }
@@ -51,6 +51,20 @@ public function getEntries(): ImportMapEntries
                 trigger_deprecation('symfony/asset-mapper', '6.4', 'The "url" option is deprecated, use "version" instead.');
             }
 
+            // should solve itself when the config is written again
+            if (isset($data['downloaded_to'])) {
+                trigger_deprecation('symfony/asset-mapper', '6.4', 'The "downloaded_to" option is deprecated and will be removed.');
+                // remove deprecated downloaded_to
+                unset($data['downloaded_to']);
+            }
+
+            // should solve itself when the config is written again
+            if (isset($data['preload'])) {
+                trigger_deprecation('symfony/asset-mapper', '6.4', 'The "preload" option is deprecated, preloading is automatically done.');
+                // remove deprecated preload
+                unset($data['preload']);
+            }
+
             $type = isset($data['type']) ? ImportMapType::tryFrom($data['type']) : ImportMapType::JS;
             $isEntrypoint = $data['entrypoint'] ?? false;