diff --git a/slides/_redirects b/slides/_redirects
index 3ab07214..eaa025d6 100644
--- a/slides/_redirects
+++ b/slides/_redirects
@@ -6,4 +6,4 @@
 # And this allows to do "git clone https://container.training".
 /info/refs service=git-upload-pack https://github.com/jpetazzo/container.training/info/refs?service=git-upload-pack
 
-/ /lisa.html 200
+/ /lisa.html 200!