diff --git a/deidentify_string/deidentify_string.ipynb b/deidentify_string/deidentify_string.ipynb
index 0a66bbe..e939ab2 100644
--- a/deidentify_string/deidentify_string.ipynb
+++ b/deidentify_string/deidentify_string.ipynb
@@ -152,7 +152,7 @@
     "CREATE OR REPLACE FUNCTION\n",
     "agentic.default.deidentify_string (\n",
     " input_text STRING COMMENT 'The string to be de-identified.',\n",
-    " sky_api_key STRING DEFAULT NULL COMMENT 'Optional: The API key for the Skyflow API.'\n",
+    " sky_api_key STRING COMMENT 'Optional: The API key for the Skyflow API.'\n",
     ")\n",
     "RETURNS STRING\n",
     "LANGUAGE PYTHON\n",