diff --git a/src/pipecat/services/fal.py b/src/pipecat/services/fal.py
index 13b48de49..cceddd6ff 100644
--- a/src/pipecat/services/fal.py
+++ b/src/pipecat/services/fal.py
@@ -56,7 +56,7 @@ class FalImageGenService(ImageGenService):
 
         response = await fal_client.run_async(
             self._model,
-            arguments={"prompt": prompt, **self._params.model_dump()}
+            arguments={"prompt": prompt, **self._params.model_dump(exclude_none=True)}
         )
 
         image_url = response["images"][0]["url"] if response else None
diff --git a/src/pipecat/transports/services/daily.py b/src/pipecat/transports/services/daily.py
index 3c7b2772c..baacda50e 100644
--- a/src/pipecat/transports/services/daily.py
+++ b/src/pipecat/transports/services/daily.py
@@ -9,7 +9,7 @@ import asyncio
 import time
 
 from dataclasses import dataclass
-from typing import Any, Awaitable, Callable, Mapping
+from typing import Any, Awaitable, Callable, Mapping, Optional
 from concurrent.futures import ThreadPoolExecutor
 
 from daily import (
@@ -101,7 +101,7 @@ class DailyTranscriptionSettings(BaseModel):
 class DailyParams(TransportParams):
     api_url: str = "https://api.daily.co/v1"
     api_key: str = ""
-    dialin_settings: DailyDialinSettings | None = None
+    dialin_settings: Optional[DailyDialinSettings] = None
     transcription_enabled: bool = False
     transcription_settings: DailyTranscriptionSettings = DailyTranscriptionSettings()
 
@@ -268,7 +268,7 @@ class DailyTransportClient(EventHandler):
                     logger.info(
                         f"Enabling transcription with settings {self._params.transcription_settings}")
                     self._client.start_transcription(
-                        self._params.transcription_settings.model_dump())
+                        self._params.transcription_settings.model_dump(exclude_none=True))
 
                 await self._callbacks.on_joined(data["participants"]["local"])
             else: