diff --git a/update.sh b/update.sh
index 64a6075..a0e0739 100755
--- a/update.sh
+++ b/update.sh
@@ -37,6 +37,10 @@ docker compose up -d
 echo "[+] Running automated database migrations..."
 docker exec nexus-guard-suite-server-core-1 ./server-core -migrate-prod || echo "[!] Migration skipped or failed. It might not be needed."
 
+# 5b. Backfill interface addresses for existing nodes (idempotent)
+echo "[+] Backfilling interface addresses for existing nodes..."
+docker exec nexus-guard-suite-server-core-1 ./server-core -backfill-interface 2>/dev/null || echo "[!] Backfill skipped or not needed."
+
 # 6. Cleanup
 echo "[+] Cleaning up unused dangling images to free up space..."
 docker image prune -f