diff --git a/src/dotenv/main.py b/src/dotenv/main.py
index 9eada8a1..2cc9e26e 100644
--- a/src/dotenv/main.py
+++ b/src/dotenv/main.py
@@ -369,7 +369,7 @@ def dotenv_values(
 
 
 def update_dict_to_dotenv(dotenv_path, env_dict, quote_mode="always", export=False):
-    # type: (_PathLike, Dict[Text, Optional[Text]], Text, bool) -> None
+    # type: (_PathLike, Dict[Text, Text], Text, bool) -> None
     """
     Adds or Updates key/value pairs in the given dictionary to the given .env