diff --git a/server/routes/user.js b/server/routes/user.js
index a9d3f139..6a1ef0a0 100644
--- a/server/routes/user.js
+++ b/server/routes/user.js
@@ -20,8 +20,8 @@ const isSpam = (email) => {
     const noDots = email.replace(/\./g, '');
     return noDots === 'javierfranciscotmp@gmailcom'
         || noDots === 'leahmarykathryntmp@gmail.com'
-        || email.contains('dogazu')
-        || email.contains('narodowcy.net')
+        || email.includes('dogazu')
+        || email.includes('narodowcy.net')
         || email.length > 128;
 }