diff --git a/VERSION b/VERSION
index 0d91a54..9e11b32 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.3.0
+0.3.1
diff --git a/source_clean/src/main.ts b/source_clean/src/main.ts
index 2f59132..ca5f6b8 100755
--- a/source_clean/src/main.ts
+++ b/source_clean/src/main.ts
@@ -42,6 +42,15 @@ app.use(rateLimiter);
 
 // ============ 前端静态文件 ============
 const frontendDist = path.join(__dirname, 'frontend');
+// Cache control: HTML no-cache, hashed assets immutable
+app.use((req, res, next) => {
+  if (req.path.endsWith('.html')) {
+    res.setHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
+  } else if (req.path.startsWith('/assets/')) {
+    res.setHeader('Cache-Control', 'public, max-age=31536000, immutable');
+  }
+  next();
+});
 app.use(express.static(frontendDist));
 
 // ============ Routes ============