diff --git a/llm/llm.go b/llm/llm.go
index 748cb8b..9372bf0 100644
--- a/llm/llm.go
+++ b/llm/llm.go
@@ -76,9 +76,10 @@ func (l *LlmConnector) Summarize(text string, model string) (string, error) {
 			{
 				Role: openai.ChatMessageRoleSystem,
 				Content: "You're a text shortener. Give a very brief summary of the main facts " +
-					"point by point.  Format them as a list of bullet points. " +
+					"point by point.  Format them as a list of bullet points each starting with \"-\". " +
 					"Avoid any commentaries and value judgement on the matter. " +
-					"If possible, use the same language as the original text.",
+					"If possible, respond in the same language as the original text." +
+					"Do not use any non-ASCII characters.",
 			},
 		},
 	}