diff --git a/machines/pretalx/configuration.nix b/machines/pretalx/configuration.nix
index e59d26e..decc3bf 100644
--- a/machines/pretalx/configuration.nix
+++ b/machines/pretalx/configuration.nix
@@ -19,7 +19,9 @@ in
     useDHCP = false;
   };
 
+  disabledModules = [ "services/web-apps/pretalx.nix" ];
   imports = [
+    "${inputs.nixpkgs-unstable}/nixos/modules/services/web-apps/pretalx.nix"
     self.nixosModules.malobeo.metrics
     self.nixosModules.malobeo.users
     ../modules/sshd.nix
@@ -78,6 +80,7 @@ in
       config.sops.secrets.pretalx_smtp.path
     ];
     settings = {
+      redis.session = false;
       locale = {
         language_code = "de";
       };