diff --git a/buildbot_nix/__init__.py b/buildbot_nix/__init__.py
index bfddb08..6f2435c 100644
--- a/buildbot_nix/__init__.py
+++ b/buildbot_nix/__init__.py
@@ -741,6 +741,7 @@ class GerritNixConfigurator(ConfiguratorBase):
         gerrit_sshkey_path: str,
         projects: list[str],
         url: str,
+        allowed_origins: list[str],
         nix_supported_systems: list[str],
         nix_eval_worker_count: int | None,
         nix_eval_max_memory_size: int,
@@ -750,6 +751,7 @@ class GerritNixConfigurator(ConfiguratorBase):
         auth_method: AuthBase | None = None,
     ) -> None:
         super().__init__()
+        self.allowed_origins = allowed_origins
         self.gerrit_server = gerrit_server
         self.gerrit_user = gerrit_user
         self.gerrit_port = gerrit_port
@@ -783,7 +785,9 @@ class GerritNixConfigurator(ConfiguratorBase):
 
         config.setdefault("projects", [])
         config.setdefault("secretsProviders", [])
-        config.setdefault("www", {})
+        config.setdefault("www", {
+            'allowed_origins': self.allowed_origins
+        })
 
         for item in worker_config:
             cores = item.get("cores", 0)
diff --git a/nix/coordinator.nix b/nix/coordinator.nix
index ab2e072..52c54d0 100644
--- a/nix/coordinator.nix
+++ b/nix/coordinator.nix
@@ -51,6 +51,12 @@ in
         example = "buildbot.numtide.com";
       };
 
+      allowedOrigins = lib.mkOption {
+        type = lib.types.str;
+        description = "Allowed origins for buildbot";
+        example = [ "*.mydomain.com" ];
+      };
+
       signingKeyFile = lib.mkOption {
         type = lib.types.nullOr lib.types.path;
         description = "A path to a Nix signing key";
@@ -167,6 +173,7 @@ in
               "${toString cfg.gerrit.port}",
               "${cfg.gerrit.privateKeyFile}",
               projects=${builtins.toJSON cfg.gerrit.projects},
+              allowed_origins=${builtins.toJSON cfg.allowedOrigins},
               url=${builtins.toJSON config.services.buildbot-master.buildbotUrl},
               nix_eval_max_memory_size=${builtins.toJSON cfg.evalMaxMemorySize},
               nix_eval_worker_count=${if cfg.evalWorkerCount == null then "None" else builtins.toString cfg.evalWorkerCount},