diff --git a/bootstrap.sh b/bootstrap.sh
index 7ffd502..2008d47 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -18,12 +18,13 @@ function isDebug() {
 }
 
 function main() {
+  id -Gn | grep admin >&! /dev/null || { echo 'This script requires root access. Please run as an admin user.' >&2; return 10 }
   local tmpdir="`mktemp -d -t 'macos-system'`"
   isDebug || trap "rm -fr -- '${tmpdir}'; return" INT TERM EXIT
   pushd -q "${tmpdir}"
   cloneMacOSSystemRepo
   cloneZSHLibRepo
-  ./install.sh
+  sudo ./install.sh
   popd -q
 }
 
diff --git a/install.sh b/install.sh
index 3306f99..52425bb 100755
--- a/install.sh
+++ b/install.sh
@@ -256,6 +256,7 @@ function isPlistBuddyInstalled() {
 function checkPrerequisites() {
   isMacOS || { lop error 'This setup is only for macOS 10.13 and up.'; return 10 }
   isPlistBuddyInstalled || { lop error 'This setup requires PlistBuddy to be either at /usr/libexec or in any of the PATH directories.'; return 11 }
+  test "`id -u`" -eq 0 || { lop error 'This module requires root access. Please run as root.'; return 11 }
 }
 
 function main() {