diff --git a/templates/about.html b/templates/about.html
index 6184755..92bb7fe 100644
--- a/templates/about.html
+++ b/templates/about.html
@@ -10,7 +10,7 @@
 <p>Languages: German, English</p>
 <p>Programming languages: Python, Bash, POSIX Shell, Powershell</p>
 <p>Markup languages: HTML, MD</p>
-<p>Structure languages: JSON, XML, YAML, TOML</p>
+<p>Structure languages: JSON, XML, YAML, TOML, Jinja</p>
 <p>Query languages: SQL(MariaDB, SQLite3)</p>
 <p>Services managed: SSH, DNS, DHCP, AD, PF, UFW, NF-Tables,
 RDP(XRDP, Microsoft RDP), Webserver(Apache24, Nginx, OpenBSD-httpd,