diff --git a/readme.md b/readme.md
index c4ad6e8c..be341c09 100644
--- a/readme.md
+++ b/readme.md
@@ -434,7 +434,7 @@ I will soon publish a contributing.md listing the code style to use.
 * Eric Johnson
 * Ernest Murphy (NH7L)
 * Flinger Films
-* [Frank Werner (HB9FXQ)](twitter.com/HB9FXQ)
+* [Frank Werner (HB9FXQ)](https://twitter.com/HB9FXQ)
 * gringogrigio
 * Jeff Moe
 * Joe Cupano