diff --git a/manifests/init.pp b/manifests/init.pp
index b76f9b587e30ed5756030f55990a85bcca451a8f..a6709358193ce6b3103661075d966540ab8c835f 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -2,7 +2,7 @@
 class keso {
   # include profiles::letsencrypt
   profiles::letsencrypt::cert { fact('networking.fqdn'):
-    addn_domains => 'keso.iei.liu.se','www.kanseiengineering.net'
+    addn_domains => ['keso.iei.liu.se','www.kanseiengineering.net']
   }
 
   users::liu_user { 'andpi98':