diff --git a/nixos/modules/services/misc/redmine.nix b/nixos/modules/services/misc/redmine.nix
index d881ea913695..a296fd3816bb 100644
--- a/nixos/modules/services/misc/redmine.nix
+++ b/nixos/modules/services/misc/redmine.nix
@@ -419,7 +419,7 @@ in
         Group = cfg.group;
         TimeoutSec = "300";
         WorkingDirectory = "${cfg.package}/share/redmine";
-        ExecStart="${bundle} exec rails server webrick -e production -p ${toString cfg.port} -P '${cfg.stateDir}/redmine.pid'";
+        ExecStart="${bundle} exec rails server -u webrick -e production -p ${toString cfg.port} -P '${cfg.stateDir}/redmine.pid'";
       };
 
     };