diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index 7fd3d2ca3..e88e90d67 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -34,7 +34,7 @@ If you get a result, the module is present.
 
 Required:
 
-* PHP (7.1, 7.2, 7.3 or 7.4)
+* PHP (7.2, 7.3 or 7.4)
 * PHP module ctype
 * PHP module curl
 * PHP module dom