diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60e4151af..615ad05c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `pipecat.frames.frames.KeypadEntry` is deprecated and has been moved to
   `pipecat.audio.dtmf.types.KeypadEntry`.
 
+- Updated `RimeTTSService`'s flush_audio message to conform with Rime's official API.
+
 ## Removed
 
 - Remove `StopInterruptionFrame`. This was a legacy frame that was not being
diff --git a/src/pipecat/services/rime/tts.py b/src/pipecat/services/rime/tts.py
index e18df2742..be979b7f9 100644
--- a/src/pipecat/services/rime/tts.py
+++ b/src/pipecat/services/rime/tts.py
@@ -323,7 +323,7 @@ class RimeTTSService(AudioContextWordTTSService):
             return
 
         logger.trace(f"{self}: flushing audio")
-        await self._get_websocket().send(json.dumps({"text": " "}))
+        await self._get_websocket().send(json.dumps({"operation": "flush"}))
         self._context_id = None
 
     async def _receive_messages(self):