diff --git a/lib/Server.js b/lib/Server.js
index 4b8befb376..505898f7f6 100644
--- a/lib/Server.js
+++ b/lib/Server.js
@@ -1841,7 +1841,10 @@ class Server {
       (this.server).on(
         "upgrade",
         /** @type {RequestHandler & { upgrade: NonNullable<RequestHandler["upgrade"]> }} */
-        (webSocketProxy).upgrade
+        (req, ...rest) =>
+          req.url !== this.options.webSocketServer.options.path
+            ? webSocketProxy.upgrade(req, ...rest)
+            : null,
       );
     }, this);
   }