diff --git a/vite.config.js b/vite.config.js
index cd9110a..61e5d1e 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -7,6 +7,11 @@ export default defineConfig({
     server: {
         port: 1421,
         strictPort: true,
+        // Bind IPv4 loopback explicitly. With no host, Vite on modern Node
+        // binds [::1] ONLY, while WebView2 resolves the devUrl's "localhost"
+        // to 127.0.0.1 — so the window opens on ERR_CONNECTION_REFUSED while
+        // curl and the browser (which try ::1) both say the server is fine.
+        host: "127.0.0.1",
         watch: {
             // Never watch the Rust build dir: cargo locks files mid-compile,
             // which crashes Vite's watcher (EBUSY) and kills tauri dev.