diff --git a/flake.nix b/flake.nix
index a8a5552..b9c86e9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -50,6 +50,7 @@
             hash = "sha256-1x+pYMHaKgLFWcL1axOv/ok1ebs0I7Q+Q6htncmgJzU=";
             localSettings = pkgs.writeText "local_settings.py" ''
               import os
+              CSRF_TRUSTED_HOSTS = os.getenv("CSRF_TRUSTED_HOSTS", "").split(",")
               STATIC_ROOT = os.getenv("STATIC_ROOT")
               STATICFILES_DIRS = [ ]
               SECRET_KEY_FILE = os.getenv("SECRET_KEY_FILE")