diff --git a/mathbot/static.py b/mathbot/static.py
index cafbfe5..80d3dbe 100644
--- a/mathbot/static.py
+++ b/mathbot/static.py
@@ -29,6 +29,7 @@ Usage:
 - `/rsmath LATEX` render __LATEX__ after substituting `/` -> `\\`.
 - `/rscmath <CAPTION> LATEX` like `/rcmath` after substituting `/` -> `\\` in __LATEX__.
 
+Source: [gitea repository](https://daknuett.eu/gitea/daknuett/telegram-mathbot)
 
 '''