diff --git a/nixos/modules/services/web-apps/whitebophir.nix b/nixos/modules/services/web-apps/whitebophir.nix
index a19812547c4..b265296d5c1 100644
--- a/nixos/modules/services/web-apps/whitebophir.nix
+++ b/nixos/modules/services/web-apps/whitebophir.nix
@@ -16,6 +16,12 @@ in {
         description = "Whitebophir package to use.";
       };
 
+      listenAddress = mkOption {
+        type = types.str;
+        default = "0.0.0.0";
+        description = "Address to listen on (use 0.0.0.0 to allow access from any address).";
+      };
+
       port = mkOption {
         type = types.port;
         default = 5001;
@@ -30,7 +36,8 @@ in {
       wantedBy    = [ "multi-user.target" ];
       after       = [ "network.target" ];
       environment = {
-        PORT            = "${toString cfg.port}";
+        PORT            = toString cfg.port;
+        HOST            = toString cfg.listenAddress;
         WBO_HISTORY_DIR = "/var/lib/whitebophir";
       };