diff --git a/headscale-auto-register.sh b/headscale-auto-register.sh
index b20ce37..7f5070a 100755
--- a/headscale-auto-register.sh
+++ b/headscale-auto-register.sh
@@ -520,9 +520,9 @@ collect_pharmacy_info() {
 get_assigned_vpn_ip() {
     echo -e "${BLUE}VPN IP 확인 중...${NC}"
 
-    # tailscale status로 IP 추출 (최대 10초 대기)
+    # tailscale ip -4로 IP 추출 (최대 10초 대기)
     for i in {1..10}; do
-        VPN_IP=$(tailscale status --json 2>/dev/null | grep -oP '"TailscaleIPs":\["\K[^"]+' | head -1)
+        VPN_IP=$(tailscale ip -4 2>/dev/null)
 
         if [ -n "$VPN_IP" ]; then
             echo -e "${GREEN}✓ VPN IP: $VPN_IP${NC}"