diff --git a/nixos/boxes/vpsfree1/default.nix b/nixos/boxes/vpsfree1/default.nix
index 0e5abc6c..a0fa3a60 100644
--- a/nixos/boxes/vpsfree1/default.nix
+++ b/nixos/boxes/vpsfree1/default.nix
@@ -32,5 +32,6 @@
     algorithm = "zstd";
     memoryPercent = 50;
   };
+
   nix.buildCores = 7;
 }
diff --git a/nixos/boxes/vpsfree1/mastodon.nix b/nixos/boxes/vpsfree1/mastodon.nix
index 10552ece..7c1627ff 100644
--- a/nixos/boxes/vpsfree1/mastodon.nix
+++ b/nixos/boxes/vpsfree1/mastodon.nix
@@ -119,6 +119,7 @@ in {
         extraConfig = {
           SMTP_TLS = "true";
           SMTP_ENABLE_STARTTLS_AUTO = "true";
+          SINGLE_USER_MODE = "true";
         };
         inherit streamingPort;
         inherit webPort;