diff --git a/bindings/python/tokenizers/implementations/base_tokenizer.py b/bindings/python/tokenizers/implementations/base_tokenizer.py
index 1e368f2e..e76dda9a 100644
--- a/bindings/python/tokenizers/implementations/base_tokenizer.py
+++ b/bindings/python/tokenizers/implementations/base_tokenizer.py
@@ -209,7 +209,7 @@ class BaseTokenizer:
         """
         return self._tokenizer.id_to_token(id)
 
-    def save(self, directory: str, name: str = None):
+    def save(self, directory: str, name: Optional[str] = None):
         """ Save the current model to the given directory
 
         Args: