diff --git a/integrations/cohere/src/cohere_haystack/chat/chat_generator.py b/integrations/cohere/src/cohere_haystack/chat/chat_generator.py
index be236f6ca..1e5aa0e42 100644
--- a/integrations/cohere/src/cohere_haystack/chat/chat_generator.py
+++ b/integrations/cohere/src/cohere_haystack/chat/chat_generator.py
@@ -158,7 +158,7 @@ def run(self, messages: List[ChatMessage], generation_kwargs: Optional[Dict[str,
                     stream_chunk = self._build_chunk(chunk)
                     self.streaming_callback(stream_chunk)
             chat_message = ChatMessage.from_assistant(content=response.texts)
-            chat_message.metadata.update(
+            chat_message.meta.update(
                 {
                     "model": self.model_name,
                     "usage": response.token_count,
@@ -180,9 +180,7 @@ def _build_chunk(self, chunk) -> StreamingChunk:
         :return: The StreamingChunk.
         """
         # if chunk.event_type == "text-generation":
-        chat_message = StreamingChunk(
-            content=chunk.text, metadata={"index": chunk.index, "event_type": chunk.event_type}
-        )
+        chat_message = StreamingChunk(content=chunk.text, meta={"index": chunk.index, "event_type": chunk.event_type})
         return chat_message
 
     def _build_message(self, cohere_response):
@@ -193,7 +191,7 @@ def _build_message(self, cohere_response):
         """
         content = cohere_response.text
         message = ChatMessage.from_assistant(content=content)
-        message.metadata.update(
+        message.meta.update(
             {
                 "model": self.model_name,
                 "usage": cohere_response.token_count,
diff --git a/integrations/cohere/tests/test_cohere_chat_generator.py b/integrations/cohere/tests/test_cohere_chat_generator.py
index f9ac7b2c6..20a02863a 100644
--- a/integrations/cohere/tests/test_cohere_chat_generator.py
+++ b/integrations/cohere/tests/test_cohere_chat_generator.py
@@ -245,7 +245,7 @@ def mock_iter(self):  # noqa: ARG001
     )
     @pytest.mark.integration
     def test_live_run(self):
-        chat_messages = [ChatMessage(content="What's the capital of France", role=ChatRole.USER, name="", metadata={})]
+        chat_messages = [ChatMessage(content="What's the capital of France", role=ChatRole.USER, name="", meta={})]
         component = CohereChatGenerator(
             api_key=os.environ.get("COHERE_API_KEY"), generation_kwargs={"temperature": 0.8}
         )
@@ -291,7 +291,7 @@ def __call__(self, chunk: StreamingChunk) -> None:
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.content[0]
 
-        assert message.metadata["finish_reason"] == "COMPLETE"
+        assert message.meta["finish_reason"] == "COMPLETE"
 
         assert callback.counter > 1
         assert "Paris" in callback.responses
@@ -302,7 +302,7 @@ def __call__(self, chunk: StreamingChunk) -> None:
     )
     @pytest.mark.integration
     def test_live_run_with_connector(self):
-        chat_messages = [ChatMessage(content="What's the capital of France", role=ChatRole.USER, name="", metadata={})]
+        chat_messages = [ChatMessage(content="What's the capital of France", role=ChatRole.USER, name="", meta={})]
         component = CohereChatGenerator(
             api_key=os.environ.get("COHERE_API_KEY"), generation_kwargs={"temperature": 0.8}
         )
@@ -310,8 +310,8 @@ def test_live_run_with_connector(self):
         assert len(results["replies"]) == 1
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.content
-        assert message.metadata["documents"] is not None
-        assert message.metadata["citations"] is not None
+        assert message.meta["documents"] is not None
+        assert message.meta["citations"] is not None
 
     @pytest.mark.skipif(
         not os.environ.get("COHERE_API_KEY", None),
@@ -337,10 +337,10 @@ def __call__(self, chunk: StreamingChunk) -> None:
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.content[0]
 
-        assert message.metadata["finish_reason"] == "COMPLETE"
+        assert message.meta["finish_reason"] == "COMPLETE"
 
         assert callback.counter > 1
         assert "Paris" in callback.responses
 
-        assert message.metadata["documents"] is not None
-        assert message.metadata["citations"] is not None
+        assert message.meta["documents"] is not None
+        assert message.meta["citations"] is not None