diff --git a/backend/src/router.rs b/backend/src/router.rs
index a239730..1793941 100644
--- a/backend/src/router.rs
+++ b/backend/src/router.rs
@@ -100,7 +100,7 @@ pub fn build_router(state: AppState, config: &AppConfig) -> Router {
     let index_file = format!("{}/index.html", static_dir);
 
     let spa_fallback =
-        ServeDir::new(&static_dir).not_found_service(ServeFile::new(&index_file));
+        ServeDir::new(&static_dir).fallback(ServeFile::new(&index_file));
 
     // Build the full application with state
     let mut app = Router::new()