diff --git a/api/responder.py b/api/responder.py
index 7b6f6a8..a19c4df 100644
--- a/api/responder.py
+++ b/api/responder.py
@@ -151,7 +151,7 @@ async def respond(
                             chunk = chunk.decode('utf8').strip()
 
                             if 'azure' in provider_name:
-                                chunk = chunk.strip().replace('data: ', '')
+                                chunk = chunk.strip().replace('data: ', '', 1)
 
                                 if not chunk or 'prompt_filter_results' in chunk:
                                     continue
diff --git a/checks/client.py b/checks/client.py
index a149377..e7a8ebe 100644
--- a/checks/client.py
+++ b/checks/client.py
@@ -100,7 +100,7 @@ async def test_chat_stream_gpt3() -> float:
 
     async for chunk in response.aiter_text():
         for subchunk in chunk.split('\n\n'):
-            chunk = subchunk.replace('data: ', '').strip()
+            chunk = subchunk.replace('data: ', '', 1).strip()
 
             if chunk == '[DONE]':
                 break