diff --git a/4.2.3-uMatrix.md b/4.2.3-uMatrix.md
index eeb98f6..59cac1a 100644
--- a/4.2.3-uMatrix.md
+++ b/4.2.3-uMatrix.md
@@ -1,6 +1,6 @@
-:large_orange_diamond: **Block TLDs**
+:large_orange_diamond: **Block ccTLDs**
 
-Example, blocking Cameroon (`.cm`)
+Example: blocking [.cm](https://en.wikipedia.org/wiki/.cm) (the [ccTLD](https://en.wikipedia.org/wiki/Country_code_top-level_domain) for Cameroon).
 
 ```
 * cm * block