diff --git a/content/posts/sprint-lyon.md b/content/posts/sprint-lyon.md
index dffb426..b057c7a 100644
--- a/content/posts/sprint-lyon.md
+++ b/content/posts/sprint-lyon.md
@@ -96,7 +96,7 @@ current release (0.11) or trunk.
 [XEP_0045]: https://xmpp.org/extensions/xep-0045.xml
 [Prosody-occupant-id]: https://modules.prosody.im/mod_muc_occupant_id.html
 
-![Bastille day fireworks](sprint-lyon-fireworks.jpg)
+![Bastille day fireworks by https://twitter.com/olek_impek](sprint-lyon-fireworks.jpg)
 
 ### And more