diff --git a/internal/chatgpt/convert.go b/internal/chatgpt/convert.go
index 49de496..272d95e 100644
--- a/internal/chatgpt/convert.go
+++ b/internal/chatgpt/convert.go
@@ -8,7 +8,7 @@ func ConvertAPIRequest(api_request typings.APIRequest) typings.ChatGPTRequest {
 	chatgpt_request := typings.NewChatGPTRequest()
 	for _, api_message := range api_request.Messages {
 		if api_message.Role == "system" {
-			api_message.Role = "tool"
+			api_message.Role = "critic"
 		}
 		chatgpt_request.AddMessage(api_message.Role, api_message.Content)
 	}