diff --git a/vite.config.js b/vite.config.js
index 4c27bac..9749689 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -21,6 +21,7 @@ export default ({mode}) => {
         server: {
             host: '0.0.0.0',
             port: 5173,
+            strictPort: true,
 
             hmr: {
                 host: 'ui.dev.mail.nexlab.at',