diff --git a/dialogy/plugins/text/dob_plugin/__init__.py b/dialogy/plugins/text/dob_plugin/__init__.py
index 32b7326e..35a34c9e 100644
--- a/dialogy/plugins/text/dob_plugin/__init__.py
+++ b/dialogy/plugins/text/dob_plugin/__init__.py
@@ -123,7 +123,7 @@ def get_transcripts_from_utterances(utterances: List[Utterance], func_transcript
     output: 
     best_transcript,
     """
-    result_dict: Dict[str, Any] = {}
+    result_dict: Dict[str, Optional[Any]] = {}
     transcripts: List[str] = []
 
     for utterance_set in utterances: