diff --git a/module/default.nix b/module/default.nix
index 735dc3053c5d90eeef45295ec6468cabdb30228a..9a08427bdae1a0dfca036ae9ccfd34a1c8b9ce2a 100644
--- a/module/default.nix
+++ b/module/default.nix
@@ -85,6 +85,7 @@             in "${pkg}/bin/tsnet-serve ${lib.concatStringsSep " " args}";
             User = instanceCfg.user;
             Restart = "on-failure";
             Environment = ["TS_AUTHKEY=${instanceCfg.authKey}"];
+            WorkingDirectory = instanceCfg.stateDir;
           };
         }
     ) (lib.filterAttrs (name: instanceCfg: instanceCfg.enable) cfg.instances);