diff --git a/templates/groundedness_score.jinja2 b/templates/groundedness_score.jinja2
index 857f5eda..8962831f 100644
--- a/templates/groundedness_score.jinja2
+++ b/templates/groundedness_score.jinja2
@@ -32,6 +32,7 @@ Key points:
 - if the CONTEXT is a basic greeting, like "Hello" and the ANSWER is a basic greeting also, groundedness is 5
 - Focus on facts, not on the language used to present the facts
 - If the ANSWER presents a fact, and the CONTEXT presents the same fact, groundedness is 5
+- Your ANSWER must **ONLY** be a number from 1-5
 
 Reminder: The return values for each task should be correctly formatted as an integer between 1 and 5. Do not repeat the context.