diff --git a/sample-index.gmi b/sample-index.gmi
index 4e5240f..308de41 100644
--- a/sample-index.gmi
+++ b/sample-index.gmi
@@ -8,7 +8,10 @@ A non-official Gemini version of FOSDEM schedule for the 2021 "COVID edition".
 => https://fosdem.org/ FOSDEM official page
 => https://fosdem.org/2021/schedule/ FOSDEM official schedule
 
-The schedule here is automatically produced from the FOSDEM "Pentabarf" files.
+The schedule here is automatically produced from the FOSDEM
+"Pentabarf" files.
+
+=> https://forge.chapril.org/bortzmeyer/fosdem2gemini Source code for the conversion.
 
 This service is maintained by Stéphane Bortzmeyer <stephane+fosdem@bortzmeyer.org>.