diff --git a/runbooks/source/investigating-blocked-ingress-spikes.html.md.erb b/runbooks/source/investigating-blocked-ingress-spikes.html.md.erb
index 15f2a866..97276a21 100644
--- a/runbooks/source/investigating-blocked-ingress-spikes.html.md.erb
+++ b/runbooks/source/investigating-blocked-ingress-spikes.html.md.erb
@@ -28,4 +28,4 @@ Further issues can be raised in the Cloud Platform issue [tracker](https://githu
 
 ## Other Links
 
-* [Debugging 101](https://www.netnea.com/cms/apache-tutorial-7_including-modsecurity-core-rules/)
\ No newline at end of file
+* [Debugging 101](https://runbooks.cloud-platform.service.justice.gov.uk/debugging-101.html)