diff --git a/macos-py3.10-requirements.txt b/macos-py3.10-requirements.txt
index 80bb08196..35ddcd8b6 100644
--- a/macos-py3.10-requirements.txt
+++ b/macos-py3.10-requirements.txt
@@ -23,7 +23,7 @@ async-timeout==4.0.3
     # via aiohttp
 attrs==23.2.0
     # via aiohttp
-av==12.0.0
+av==12.1.0
     # via faster-whisper
 azure-cognitiveservices-speech==1.37.0
     # via pipecat-ai (pyproject.toml)
diff --git a/pyproject.toml b/pyproject.toml
index 51c36c779..f52db355a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ Website = "https://pipecat.ai"
 [project.optional-dependencies]
 anthropic = [ "anthropic~=0.25.7" ]
 azure = [ "azure-cognitiveservices-speech~=1.37.0" ]
-cartesia = [ "numpy", "sounddevice", "cartesia" ]
+cartesia = [ "numpy~=1.26.0", "sounddevice", "cartesia" ]
 daily = [ "daily-python~=0.9.0" ]
 examples = [ "python-dotenv~=1.0.0", "flask~=3.0.3", "flask_cors~=4.0.1" ]
 fal = [ "fal-client~=0.4.0" ]
diff --git a/src/pipecat/services/deepgram.py b/src/pipecat/services/deepgram.py
index f773af9b1..fb4eb4d33 100644
--- a/src/pipecat/services/deepgram.py
+++ b/src/pipecat/services/deepgram.py
@@ -5,7 +5,6 @@
 #
 
 import aiohttp
-import json
 
 from typing import AsyncGenerator
 
@@ -33,8 +32,8 @@ class DeepgramTTSService(TTSService):
     async def run_tts(self, text: str) -> AsyncGenerator[Frame, None]:
         logger.info(f"Running Deepgram TTS for {text}")
         base_url = "https://api.deepgram.com/v1/speak"
-        request_url = f"{base_url}?model={
-            self._voice}&encoding=linear16&container=none&sample_rate=16000"
+        request_url = f"{base_url}?model = {
+            self._voice} & encoding = linear16 & container = none & sample_rate = 16000"
         headers = {"authorization": f"token {self._api_key}"}
         body = {"text": text}