diff --git a/extensions/x.md b/extensions/x.md
index 7f466b9..6c2c0ca 100644
--- a/extensions/x.md
+++ b/extensions/x.md
@@ -1,4 +1,4 @@
-# Twitter Extension
+# Twitter/X Extension
 This document defines how to use `x` extension in AsyncAPI documents.
 
 ## Overview