diff --git a/src/pipecat/services/azure.py b/src/pipecat/services/azure.py
index 2d43d9a8c..17ec34051 100644
--- a/src/pipecat/services/azure.py
+++ b/src/pipecat/services/azure.py
@@ -171,12 +171,12 @@ class AzureImageGenServiceREST(ImageGenService):
     def __init__(
         self,
         *,
-        aiohttp_session: aiohttp.ClientSession,
         image_size: str,
         api_key: str,
         endpoint: str,
         model: str,
         api_version="2023-06-01-preview",
+        aiohttp_session: aiohttp.ClientSession | None = None,
     ):
         super().__init__()
 
@@ -184,8 +184,14 @@ def __init__(
         self._azure_endpoint = endpoint
         self._api_version = api_version
         self._model = model
-        self._aiohttp_session = aiohttp_session
         self._image_size = image_size
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
+
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
 
     async def run_image_gen(self, prompt: str) -> AsyncGenerator[Frame, None]:
         url = f"{self._azure_endpoint}openai/images/generations:submit?api-version={self._api_version}"
diff --git a/src/pipecat/services/deepgram.py b/src/pipecat/services/deepgram.py
index 1c20df45c..1cc69ca5a 100644
--- a/src/pipecat/services/deepgram.py
+++ b/src/pipecat/services/deepgram.py
@@ -45,25 +45,31 @@ class DeepgramTTSService(TTSService):
     def __init__(
             self,
             *,
-            aiohttp_session: aiohttp.ClientSession,
             api_key: str,
             voice: str = "aura-helios-en",
             base_url: str = "https://api.deepgram.com/v1/speak",
             sample_rate: int = 16000,
             encoding: str = "linear16",
+            aiohttp_session: aiohttp.ClientSession | None = None,
             **kwargs):
         super().__init__(**kwargs)
 
         self._voice = voice
         self._api_key = api_key
-        self._aiohttp_session = aiohttp_session
         self._base_url = base_url
         self._sample_rate = sample_rate
         self._encoding = encoding
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
 
     def can_generate_metrics(self) -> bool:
         return True
 
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
+
     async def set_voice(self, voice: str):
         logger.debug(f"Switching TTS voice to: [{voice}]")
         self._voice = voice
diff --git a/src/pipecat/services/elevenlabs.py b/src/pipecat/services/elevenlabs.py
index 1bf0fe6ca..b81773346 100644
--- a/src/pipecat/services/elevenlabs.py
+++ b/src/pipecat/services/elevenlabs.py
@@ -19,21 +19,27 @@ class ElevenLabsTTSService(TTSService):
     def __init__(
             self,
             *,
-            aiohttp_session: aiohttp.ClientSession,
             api_key: str,
             voice_id: str,
             model: str = "eleven_turbo_v2",
+            aiohttp_session: aiohttp.ClientSession | None = None,
             **kwargs):
         super().__init__(**kwargs)
 
         self._api_key = api_key
         self._voice_id = voice_id
-        self._aiohttp_session = aiohttp_session
         self._model = model
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
 
     def can_generate_metrics(self) -> bool:
         return True
 
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
+
     async def set_voice(self, voice: str):
         logger.debug(f"Switching TTS voice to: [{voice}]")
         self._voice_id = voice
diff --git a/src/pipecat/services/fal.py b/src/pipecat/services/fal.py
index cceddd6ff..f4811e4d5 100644
--- a/src/pipecat/services/fal.py
+++ b/src/pipecat/services/fal.py
@@ -39,18 +39,24 @@ class InputParams(BaseModel):
     def __init__(
         self,
         *,
-        aiohttp_session: aiohttp.ClientSession,
         params: InputParams,
         model: str = "fal-ai/fast-sdxl",
         key: str | None = None,
+        aiohttp_session: aiohttp.ClientSession | None = None,
     ):
         super().__init__()
         self._model = model
         self._params = params
-        self._aiohttp_session = aiohttp_session
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
         if key:
             os.environ["FAL_KEY"] = key
 
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
+
     async def run_image_gen(self, prompt: str) -> AsyncGenerator[Frame, None]:
         logger.debug(f"Generating image from prompt: {prompt}")
 
diff --git a/src/pipecat/services/openai.py b/src/pipecat/services/openai.py
index 3e1a6effc..574021273 100644
--- a/src/pipecat/services/openai.py
+++ b/src/pipecat/services/openai.py
@@ -253,16 +253,22 @@ class OpenAIImageGenService(ImageGenService):
     def __init__(
         self,
         *,
-        image_size: Literal["256x256", "512x512", "1024x1024", "1792x1024", "1024x1792"],
-        aiohttp_session: aiohttp.ClientSession,
         api_key: str,
         model: str = "dall-e-3",
+        image_size: Literal["256x256", "512x512", "1024x1024", "1792x1024", "1024x1792"],
+        aiohttp_session: aiohttp.ClientSession | None = None,
     ):
         super().__init__()
         self._model = model
         self._image_size = image_size
         self._client = AsyncOpenAI(api_key=api_key)
-        self._aiohttp_session = aiohttp_session
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
+
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
 
     async def run_image_gen(self, prompt: str) -> AsyncGenerator[Frame, None]:
         logger.debug(f"Generating image from prompt: {prompt}")
diff --git a/src/pipecat/services/xtts.py b/src/pipecat/services/xtts.py
index a17277b88..396bc2919 100644
--- a/src/pipecat/services/xtts.py
+++ b/src/pipecat/services/xtts.py
@@ -38,22 +38,28 @@ class XTTSService(TTSService):
     def __init__(
             self,
             *,
-            aiohttp_session: aiohttp.ClientSession,
             voice_id: str,
             language: str,
             base_url: str,
+            aiohttp_session: aiohttp.ClientSession | None = None,
             **kwargs):
         super().__init__(**kwargs)
 
         self._voice_id = voice_id
         self._language = language
         self._base_url = base_url
-        self._aiohttp_session = aiohttp_session
         self._studio_speakers = requests.get(self._base_url + "/studio_speakers").json()
+        self._aiohttp_session = aiohttp_session or aiohttp.ClientSession()
+        self._close_aiohttp_session = aiohttp_session is None
 
     def can_generate_metrics(self) -> bool:
         return True
 
+    async def cleanup(self):
+        await super().cleanup()
+        if self._close_aiohttp_session:
+            await self._aiohttp_session.close()
+
     async def set_voice(self, voice: str):
         logger.debug(f"Switching TTS voice to: [{voice}]")
         self._voice_id = voice