diff --git a/doc/book/cookbook/systemd.md b/doc/book/cookbook/systemd.md
index c0ed7d1f..ebff8c15 100644
--- a/doc/book/cookbook/systemd.md
+++ b/doc/book/cookbook/systemd.md
@@ -28,6 +28,7 @@ StateDirectory=garage
 DynamicUser=true
 ProtectHome=true
 NoNewPrivileges=true
+LimitNOFILE=42000
 
 [Install]
 WantedBy=multi-user.target