diff --git a/shared/utils/domains.js b/shared/utils/domains.js
index c7914482..7e47ed59 100644
--- a/shared/utils/domains.js
+++ b/shared/utils/domains.js
@@ -106,6 +106,9 @@ export const RESERVED_SUBDOMAINS = [
   'test',
   'update',
   'updates',
+  'ws',
+  'wss',
+  'websockets',
   'www',
   'www1',
   'www2',