diff --git a/README.md b/README.md
index 23be4135f899f26f923b023edba0f7f6b610c7f3..8559581022f8ad7457c90a1ae1aefb80673755b1 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ System zur Verwaltung von Protokollen und Sitzungen.
 
 Required infrastructure:
 
+* python >= 3.5
 * some WSGI-capable webserver (nginx + uwsgi, …)
 * some database (postgres, …)
 * some LDAP server (Samba 4, slapd, …) for accounts and groups