diff --git a/podcastfy.ipynb b/podcastfy.ipynb
index bd534b4..7340bf1 100644
--- a/podcastfy.ipynb
+++ b/podcastfy.ipynb
@@ -509,7 +509,7 @@
     }
    ],
    "source": [
-    "audio_file_from_topic = generate_podcast(topic=\"Latest news about OpenAI\", tts_model=\"gemini\")"
+    "audio_file_from_topic = generate_podcast(topic=\"Latest news about OpenAI\")"
    ]
   },
   {
diff --git a/podcastfy/text_to_speech.py b/podcastfy/text_to_speech.py
index 1e1737f..ee01fe7 100644
--- a/podcastfy/text_to_speech.py
+++ b/podcastfy/text_to_speech.py
@@ -23,7 +23,7 @@
 class TextToSpeech:
     def __init__(
         self,
-        model: str = "openai",
+        model: str = None,
         api_key: Optional[str] = None,
         conversation_config: Optional[Dict[str, Any]] = None,
     ):