diff --git a/services/fediversity/default.nix b/services/fediversity/default.nix
index 70f84378..309ca6f9 100644
--- a/services/fediversity/default.nix
+++ b/services/fediversity/default.nix
@@ -71,7 +71,7 @@ in
     ## `staging` vs. `production` setting somewhere.
     # use a priority higher than mkDefault for panel deployment to work,
     # yet lower than default so this will not clash with the setting in tests.
-    security.acme = lib.modules.defaultOverridePriority {
+    security.acme = lib.modules.mkOverride 900 {
       acceptTerms = true;
       defaults.email = "something@fediversity.net";
       # defaults.server = "https://acme-staging-v02.api.letsencrypt.org/directory";