diff --git a/lib/session.js b/lib/session.js
index 694465bc..f91545f3 100644
--- a/lib/session.js
+++ b/lib/session.js
@@ -32,7 +32,7 @@ export async function getSession(req) {
   }
 
   const { website_id } = website;
-  const session_uuid = uuid(website_id, hostname, ip, userAgent, os);
+  const session_uuid = uuid(website_id, hostname, ip, userAgent);
 
   let session = await getSessionByUuid(session_uuid);