diff --git a/changelog/4347.fixed.md b/changelog/4347.fixed.md
new file mode 100644
index 000000000..e5c8206e5
--- /dev/null
+++ b/changelog/4347.fixed.md
@@ -0,0 +1 @@
+- Fixed a crash in `DeepgramSTTService` when an `STTUpdateSettingsFrame` arrived before the WebSocket handshake completed (for example, when pushing an update upstream on `StartFrame`). The settings-triggered reconnect cancelled the in-flight connection task before its keepalive task was created, causing an `UnboundLocalError: cannot access local variable 'keepalive_task'` in the handler's `finally` block.
diff --git a/src/pipecat/services/deepgram/stt.py b/src/pipecat/services/deepgram/stt.py
index 66b1d70da..c9ebd49c8 100644
--- a/src/pipecat/services/deepgram/stt.py
+++ b/src/pipecat/services/deepgram/stt.py
@@ -621,6 +621,7 @@ class DeepgramSTTService(STTService):
         """
         while True:
             connect_kwargs = self._build_connect_kwargs()
+            keepalive_task = None
             try:
                 async with self._client.listen.v1.connect(**connect_kwargs) as connection:
                     self._connection = connection
@@ -639,7 +640,8 @@ class DeepgramSTTService(STTService):
             finally:
                 self._connection_ready.clear()
                 self._connection = None
-                await self.cancel_task(keepalive_task)
+                if keepalive_task:
+                    await self.cancel_task(keepalive_task)
 
     async def _keepalive_handler(self):
         """Periodically send KeepAlive frames to prevent server-side timeout.