diff --git a/hosts/hera/configuration.nix b/hosts/hera/configuration.nix
index b38edf22..1f24b34d 100644
--- a/hosts/hera/configuration.nix
+++ b/hosts/hera/configuration.nix
@@ -36,6 +36,7 @@ in {
     host = "hera-intern:9100";
   }];
 
+  systemd.package = pkgs.systemd-next;
   programs = {
     ssh.extraConfig = ''
       Host fb04*.mathematik.tu-darmstadt.de
diff --git a/overlays/10-previews.nix b/overlays/10-previews.nix
index 6222a47c..6897f085 100644
--- a/overlays/10-previews.nix
+++ b/overlays/10-previews.nix
@@ -2,6 +2,7 @@ self: super:
 let
   unstable = import self.sources.unstable { };
 in {
+  systemd-next = unstable.systemd;
   gnome3 = super.gnome3 // {
     inherit (unstable.gnome3) gnome-keyring seahorse gdm;
   };
diff --git a/system/default.nix b/system/default.nix
index fd6812a2..72c8b8a8 100644
--- a/system/default.nix
+++ b/system/default.nix
@@ -57,8 +57,6 @@ in {
     gc.options = "--delete-older-than 5d";
   };
 
-  # This is necessary because of transient timeouts in certificate renewal
-  # Retries certificate renewal every 10 minutes at most 3 times in an 45 minutes
   systemd.services = let
     hosts = builtins.attrNames config.services.nginx.virtualHosts;
     makeConfig = host: {