diff --git a/public/sites/default/settings.php b/public/sites/default/settings.php
index 9e6f7a6..9813b60 100644
--- a/public/sites/default/settings.php
+++ b/public/sites/default/settings.php
@@ -350,6 +350,7 @@ function drupal_get_env(string|array $variables) : mixed {
     'DRUPAL_DB_NAME',
     'DRUPAL_DB_PASS',
     'DRUPAL_DB_HOST',
+    'TFA_ENCRYPTION_KEY',
   ],
   'additionalFiles' => [],
 ];