diff --git a/README.md b/README.md
index 8ce831c..ddd3cbd 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ Installation
 ------------
 1. provision gitea-runner user, with home directory and clone this repo inside of it.
 1. Install docker-rootless, provision sid and gid ranges 
+    /etc/subuid and /etc/subgid need configured
 1. Install 3 systemd units, 2 user-level and 1-system level to run dbus, docker (rootless), and act_runner
 1. Install .bashrc or .profile config for user to connect to dbus, needed for systemd
 1. Start and enable the systemd units/services