Update book location

1 files changed, 1 insertions, 1 deletions

diff --git a/docker/README-testing.md b/docker/README-testing.md

index 21b99963d8..db88598b8c 100644
--- a/docker/README-testing.md
+++ b/docker/README-testing.md
@@ -15,7 +15,7 @@ and run Synapse against Complement.
 Consult the [contributing guide][guideComplementSh] for instructions on how to use it.
 
 
-[guideComplementSh]: https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#run-the-integration-tests-complement
+[guideComplementSh]: https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-integration-tests-complement
 
 ## Building and running the images manually