diff --git a/lib/self-upgrade.bash b/lib/self-upgrade.bash
new file mode 100755
index 0000000..8c69f3f
--- /dev/null
+++ b/lib/self-upgrade.bash
@@ -0,0 +1,11 @@
+#!/usr/bin/env miaou-bash
+
+# CONSTANTS
+
+# FUNCTIONS
+
+# MAIN
+
+[ "$UID" -ne 0 ] && echo 'root privilege required' && exit 1
+
+echo TODO: self-upgrade