diff --git a/util/entrypoint.sh b/util/entrypoint.sh
index 63883fd..7ceb4ff 100755
--- a/util/entrypoint.sh
+++ b/util/entrypoint.sh
@@ -5,10 +5,10 @@ set -e
 
 # Support docker run --init parameter which obsoletes the use of dumb-init,
 # but support dumb-init for those that still use it without --init
-if [ -x "/dev/init" ]; then
-    run="exec"
-else
+if [ $$ -eq 1 ]; then
     run="exec /usr/bin/dumb-init --"
+else
+    run="exec"
 fi
 
 # Single argument to command line is interface name
@@ -51,12 +51,8 @@ if [ -n "$IFACE" ]; then
 
     uid=$(stat -c%u "$data_dir")
     gid=$(stat -c%g "$data_dir")
-    if [ $gid -ne 0 ]; then
-        groupmod -g $gid dhcpd
-    fi
-    if [ $uid -ne 0 ]; then
-        usermod -u $uid dhcpd
-    fi
+    groupmod -og $gid dhcpd
+    usermod -ou $uid dhcpd
 
     [ -e "$data_dir/dhcpd.leases" ] || touch "$data_dir/dhcpd.leases"
     chown dhcpd:dhcpd "$data_dir/dhcpd.leases"
@@ -69,7 +65,7 @@ if [ -n "$IFACE" ]; then
         echo "You must add the 'docker run' option '--net=host' if you want to provide DHCP service to the host network."
     fi
 
-    $run /usr/sbin/dhcpd -$DHCPD_PROTOCOL -f -d --no-pid -cf "$data_dir/dhcpd.conf" -lf "$data_dir/dhcpd.leases" $IFACE
+    $run /usr/sbin/dhcpd -$DHCPD_PROTOCOL -f -d --no-pid -cf "$data_dir/dhcpd.conf" -lf "$data_dir/dhcpd.leases" -user dhcpd -group dhcpd $IFACE
 else
     # Run another binary
     $run "$@"