diff --git a/inference/conversation.py b/inference/conversation.py
index 411b206..8848b60 100644
--- a/inference/conversation.py
+++ b/inference/conversation.py
@@ -52,4 +52,5 @@ def get_raw_prompt(self):
 
     @classmethod
     def from_raw_prompt(cls, value):
-        self._prompt = value
+        cls._prompt = value
+