diff --git a/composer.json b/composer.json
index 09b8198d..a4693c7c 100644
--- a/composer.json
+++ b/composer.json
@@ -54,7 +54,7 @@
     "pear/text_password": "^1.1.1",
     "pear/validate_finance_creditcard": ">=0.5.2",
     "silverorange/admin": "^7.0.3",
-    "silverorange/site": "^15.3.2",
+    "silverorange/site": "^15.3.2 || ^16.0.0",
     "silverorange/swat": "^7.9.2",
     "silverorange/xml_rpc_ajax": "^3.1.0",
     "silverorange/yui": "^1.0.11"