diff --git a/README.md b/README.md
index 5226a31..467d68a 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ See https://developer.chrome.com/extensions/tut_debugging
 - Monospace fonts for numbers / checksums
 - Improves review table
     - Hides names of students (keeps the students number)
+    - Swaps red background with orange border (indicating an invalid points value)
 - Improves solution table
     - Hides status column (status indicated by color by default)