diff --git a/src/polyfill.php b/src/polyfill.php
index 56fec3e53..a27daf1f7 100644
--- a/src/polyfill.php
+++ b/src/polyfill.php
@@ -36,3 +36,6 @@ foreach ([
 $ampFilePolyfill .= '}';
 eval($ampFilePolyfill);
 unset($ampFilePolyfill);
+
+class_alias(LocalCookieJar::class, InMemoryCookieJar::class);
+class_alias(ResourceSocket::class, EncryptableSocket::class);