diff --git a/hosts/alpha/acme.nix b/hosts/alpha/acme.nix
index 6a3832a..fc4eef8 100644
--- a/hosts/alpha/acme.nix
+++ b/hosts/alpha/acme.nix
@@ -1,7 +1,7 @@
 {lib, ...}: {
   security.acme.certs = {
     "caspervk.net" = {
-      domain = "*.caspervk.net";
+      extraDomainNames = ["*.caspervk.net"];
       reloadServices = [
         "caddy.service"
         "murmur.service"
diff --git a/hosts/delta/acme.nix b/hosts/delta/acme.nix
index 07d8cb5..45a98fb 100644
--- a/hosts/delta/acme.nix
+++ b/hosts/delta/acme.nix
@@ -1,7 +1,7 @@
 {...}: {
   security.acme.certs = {
     "caspervk.net" = {
-      domain = "*.caspervk.net";
+      extraDomainNames = ["*.caspervk.net"];
       reloadServices = [
         "kresd@1.service"
         "kresd@2.service"
diff --git a/hosts/sigma/acme.nix b/hosts/sigma/acme.nix
index e56ef5f..4422569 100644
--- a/hosts/sigma/acme.nix
+++ b/hosts/sigma/acme.nix
@@ -1,7 +1,7 @@
 {lib, ...}: {
   security.acme.certs = {
     "caspervk.net" = {
-      domain = "*.caspervk.net";
+      extraDomainNames = ["*.caspervk.net"];
       reloadServices = [
         "caddy.service"
         "dovecot2.service"