diff --git a/hosts/nixos/lapetus/services/commarss.nix b/hosts/nixos/lapetus/services/commarss.nix
index 71693d3..eb894cf 100644
--- a/hosts/nixos/lapetus/services/commarss.nix
+++ b/hosts/nixos/lapetus/services/commarss.nix
@@ -21,7 +21,7 @@ in
     # https://github.com/Athou/commafeed/blob/master/commafeed-server/config.yml.example
     environment = {
       CF_APP_PUBLICURL = "https://${host}";
-      CF_APP_ALLOWREGISTRATIONS = true;
+      CF_APP_ALLOWREGISTRATIONS = "true";
     };
   };
 }