diff --git a/docs/en/02_Developer_Guides/08_Performance/03_Profiling.md b/docs/en/02_Developer_Guides/08_Performance/03_Profiling.md
index be25f1298..157665ae9 100644
--- a/docs/en/02_Developer_Guides/08_Performance/03_Profiling.md
+++ b/docs/en/02_Developer_Guides/08_Performance/03_Profiling.md
@@ -9,5 +9,5 @@ optimization.
 SilverStripe does not include any profiling tools out of the box, but we recommend the use of existing tools such as 
 [XHProf](https://github.com/facebook/xhprof/) and [XDebug](http://xdebug.org/).
 
-* [Profiling with XHProf](http://techportal.inviqa.com/2009/12/01/profiling-with-xhprof/)
-* [Profiling PHP Applications With xdebug](http://devzone.zend.com/1139/profiling-php-applications-with-xdebug/)
\ No newline at end of file
+* [Profiling with XHProf](https://inviqa.com/blog/profiling-xhprof)
+* [Profiling PHP Applications With xdebug](http://devzone.zend.com/1139/profiling-php-applications-with-xdebug/)