diff --git a/27.md b/27.md
index efd2c122..133f8ef0 100644
--- a/27.md
+++ b/27.md
@@ -20,7 +20,7 @@ A reader client that receives an event with such `nostr:...` mentions in its `.c
 
 Suppose Bob is writing a note in a client that has search-and-autocomplete functionality for users that is triggered when they write the character `@`.
 
-As Bob types `"hello @mat"` the client will prompt him to autocomplete with [mattn's profile](https://gateway.nostr.com/p/2c7cc62a697ea3a7826521f3fd34f0cb273693cbe5e9310f35449f43622a5cdc), showing a picture and name.
+As Bob types `"hello @mat"` the client will prompt him to autocomplete with [mattn's profile](https://njump.me/npub1937vv2nf06360qn9y8el6d8sevnndy7tuh5nzre4gj05xc32tnwqauhaj6), showing a picture and name.
 
 Bob presses "enter" and now he sees his typed note as `"hello @mattn"`, `@mattn` is highlighted, indicating that it is a mention. Internally, however, the event looks like this: