diff --git a/apps/client_backend/requirements.txt b/apps/client_backend/requirements.txt
index bd241a3af..73e080592 100644
--- a/apps/client_backend/requirements.txt
+++ b/apps/client_backend/requirements.txt
@@ -1 +1 @@
-vocode==0.1.105
\ No newline at end of file
+vocode==0.1.108
\ No newline at end of file
diff --git a/apps/langchain_agent/requirements.txt b/apps/langchain_agent/requirements.txt
index 220e56735..3cb2883c9 100644
--- a/apps/langchain_agent/requirements.txt
+++ b/apps/langchain_agent/requirements.txt
@@ -1,3 +1,3 @@
-vocode==0.1.105
+vocode==0.1.108
 redis
 twilio
\ No newline at end of file
diff --git a/apps/langchain_agent/tools/vocode.py b/apps/langchain_agent/tools/vocode.py
index 927019d87..4c401f263 100644
--- a/apps/langchain_agent/tools/vocode.py
+++ b/apps/langchain_agent/tools/vocode.py
@@ -33,7 +33,6 @@ def call_phone_number(input: str) -> str:
         config_manager=RedisConfigManager(),
         agent_config=ChatGPTAgentConfig(
             prompt_preamble=prompt,
-            end_conversation_on_goodbye=True,
             initial_message=BaseMessage(text=initial_message),
         ),
         logger=logging.Logger("call_phone_number"),
diff --git a/apps/telephony_app/main.py b/apps/telephony_app/main.py
index 29fc52be5..5933e36d5 100644
--- a/apps/telephony_app/main.py
+++ b/apps/telephony_app/main.py
@@ -19,7 +19,7 @@
 
 config_manager = RedisConfigManager()
 
-BASE_URL = os.getenv("BASE_URL")
+BASE_URL = os.environ["BASE_URL"]
 
 telephony_server = TelephonyServer(
     base_url=BASE_URL,
diff --git a/apps/telephony_app/outbound_call.py b/apps/telephony_app/outbound_call.py
index 3ea9e0639..ecb6adbc7 100644
--- a/apps/telephony_app/outbound_call.py
+++ b/apps/telephony_app/outbound_call.py
@@ -10,7 +10,7 @@
 
 from speller_agent import SpellerAgentConfig
 
-BASE_URL = os.getenv("BASE_URL")
+BASE_URL = os.environ["BASE_URL"]
 
 config_manager = RedisConfigManager()
 
diff --git a/apps/telephony_app/requirements.txt b/apps/telephony_app/requirements.txt
index 220e56735..3cb2883c9 100644
--- a/apps/telephony_app/requirements.txt
+++ b/apps/telephony_app/requirements.txt
@@ -1,3 +1,3 @@
-vocode==0.1.105
+vocode==0.1.108
 redis
 twilio
\ No newline at end of file
diff --git a/apps/telephony_app/speller_agent.py b/apps/telephony_app/speller_agent.py
index a30634be7..15ba44972 100644
--- a/apps/telephony_app/speller_agent.py
+++ b/apps/telephony_app/speller_agent.py
@@ -1,6 +1,8 @@
+import logging
 from typing import Optional, Tuple
+import typing
 from vocode.streaming.agent.chat_gpt_agent import ChatGPTAgent
-from vocode.streaming.models.agent import AgentConfig, AgentType
+from vocode.streaming.models.agent import AgentConfig, AgentType, ChatGPTAgentConfig
 from vocode.streaming.agent.base_agent import BaseAgent
 from vocode.streaming.agent.factory import AgentFactory
 
@@ -9,22 +11,29 @@ class SpellerAgentConfig(AgentConfig, type="agent_speller"):
     pass
 
 
-class SpellerAgent(BaseAgent):
+class SpellerAgent(BaseAgent[SpellerAgentConfig]):
     def __init__(self, agent_config: SpellerAgentConfig):
         super().__init__(agent_config=agent_config)
 
-    def respond(
+    async def respond(
         self,
         human_input,
+        conversation_id: str,
         is_interrupt: bool = False,
-        conversation_id: Optional[str] = None,
     ) -> Tuple[Optional[str], bool]:
         return "".join(c + " " for c in human_input), False
 
 
 class SpellerAgentFactory(AgentFactory):
-    def create_agent(self, agent_config: AgentConfig) -> BaseAgent:
+    def create_agent(
+        self, agent_config: AgentConfig, logger: Optional[logging.Logger] = None
+    ) -> BaseAgent:
         if agent_config.type == AgentType.CHAT_GPT:
-            return ChatGPTAgent(agent_config=agent_config)
+            return ChatGPTAgent(
+                agent_config=typing.cast(ChatGPTAgentConfig, agent_config)
+            )
         elif agent_config.type == "agent_speller":
-            return SpellerAgent(agent_config=agent_config)
+            return SpellerAgent(
+                agent_config=typing.cast(SpellerAgentConfig, agent_config)
+            )
+        raise Exception("Invalid agent config")
diff --git a/vocode/streaming/output_device/twilio_output_device.py b/vocode/streaming/output_device/twilio_output_device.py
index 9c639d0fd..1dcbc767d 100644
--- a/vocode/streaming/output_device/twilio_output_device.py
+++ b/vocode/streaming/output_device/twilio_output_device.py
@@ -23,9 +23,9 @@ def __init__(
         )
         self.ws = ws
         self.stream_sid = stream_sid
+        self.active = True
         self.queue: asyncio.Queue[str] = asyncio.Queue()
         self.process_task = asyncio.create_task(self.process())
-        self.active = True
 
     async def process(self):
         while self.active:
diff --git a/vocode/streaming/output_device/websocket_output_device.py b/vocode/streaming/output_device/websocket_output_device.py
index 1fa048ce8..d8b884c7c 100644
--- a/vocode/streaming/output_device/websocket_output_device.py
+++ b/vocode/streaming/output_device/websocket_output_device.py
@@ -15,6 +15,7 @@ def __init__(
         self.ws = ws
         self.active = True
         self.queue: asyncio.Queue[str] = asyncio.Queue()
+        self.process_task = asyncio.create_task(self.process())
 
     def mark_closed(self):
         self.active = False
@@ -28,3 +29,6 @@ def send_nonblocking(self, chunk: bytes):
         if self.active:
             audio_message = AudioMessage.from_bytes(chunk)
             self.queue.put_nowait(audio_message.json())
+
+    def terminate(self):
+        self.process_task.cancel()