diff --git a/hosts/mastodon/default.nix b/hosts/mastodon/default.nix
index 3d060bda..c2590f10 100644
--- a/hosts/mastodon/default.nix
+++ b/hosts/mastodon/default.nix
@@ -117,15 +117,16 @@
       enableBirdUITheme = true;
       configureNginx = true;
       elasticsearch.host = "127.0.0.1";
-      ldap.enable = true;
-      streamingProcesses = config.microvm.vcpu - 1;
       extraConfig = {
         ALTERNATE_DOMAINS = lib.concatStringsSep "," config.services.nginx.virtualHosts.${config.services.mastodon.localDomain}.serverAliases;
         DEFAULT_LOCALE = "de";
       };
+      ldap.enable = true;
+      streamingProcesses = config.microvm.vcpu - 1;
       localDomain = "c3d2.social";
       otpSecretFile = config.sops.secrets."mastodon/otp-secret".path;
       secretKeyBaseFile = config.sops.secrets."mastodon/secret-key".path;
+      sidekiqThreads = 40; # default 25 are just not doing it anymore, especially after issues
       smtp = {
         host = "mail.c3d2.de";
         port = 587;
@@ -201,6 +202,10 @@
       mastodon-init-dirs.script = lib.mkAfter ''
         cat ${config.sops.secrets."mastodon/env".path} >> /var/lib/mastodon/.secrets_env
       '';
+
+      # sidekiq failed with:
+      #   failed to connect: Too many open files @ rb_sysopen
+      mastodon-sidekiq-all.serviceConfig.LimitNOFILE = "1048576";
     };
 
     timers.fedifetcher = {