diff --git a/README.md b/README.md
index ef35444b..78744f27 100644
--- a/README.md
+++ b/README.md
@@ -176,7 +176,7 @@ Credits
 -------
 
 * [Markus Schirp (mbj)](https://github.com/mbj)
-* A [gist](https://gist.github.com/1065789) from [dkubb](https://github.com/dkubb) showing ideas.
+* A gist, now removed, from [dkubb](https://github.com/dkubb) showing ideas.
 * Older abandoned [mutant](https://github.com/txus/mutant). For motivating me doing this one.
 * [heckle](https://github.com/seattlerb/heckle). For getting me into mutation testing.