diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index b59ee9c5b..c7220346b 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -33,7 +33,7 @@ If you get a result, the module is present.
 
 Required:
 
-* PHP (7.3 or 7.4)
+* PHP 7.3, 7.4 or **8.0** (*recommended*)
 * PHP module ctype
 * PHP module curl
 * PHP module dom