diff --git a/pr_agent/tools/pr_reviewer.py b/pr_agent/tools/pr_reviewer.py
index cb935159..f791d658 100644
--- a/pr_agent/tools/pr_reviewer.py
+++ b/pr_agent/tools/pr_reviewer.py
@@ -371,7 +371,7 @@ class PRReviewer:
                     else:
                         get_logger().warning(f"Unexpected type for estimated_effort: {type(estimated_effort)}")
                     if 1 <= estimated_effort_number <= 5:  # 1, because ...
-                        review_labels.append(f'Review effort [1-5]: {estimated_effort_number}')
+                        review_labels.append(f'Review effort {estimated_effort_number}/5')
                 if get_settings().pr_reviewer.enable_review_labels_security and get_settings().pr_reviewer.require_security_review:
                     security_concerns = data['review']['security_concerns']  # yes, because ...
                     security_concerns_bool = 'yes' in security_concerns.lower() or 'true' in security_concerns.lower()