diff --git a/machines/pretalx/configuration.nix b/machines/pretalx/configuration.nix
index e59d26e..b910001 100644
--- a/machines/pretalx/configuration.nix
+++ b/machines/pretalx/configuration.nix
@@ -78,6 +78,7 @@ in
       config.sops.secrets.pretalx_smtp.path
     ];
     settings = {
+      redis.session = false;
       locale = {
         language_code = "de";
       };