diff --git a/lib/middleware/header.js b/lib/middleware/header.js
index 2f351657d..b885ece89 100644
--- a/lib/middleware/header.js
+++ b/lib/middleware/header.js
@@ -6,7 +6,7 @@ const headers = {
     'Access-Control-Allow-Headers': 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With',
     'Access-Control-Allow-Methods': 'GET',
     'Content-Type': 'application/xml; charset=utf-8',
-    'Cache-Control': `max-age=${config.cacheExpire / 2}`,
+    'Cache-Control': `max-age=${config.cacheExpire}`,
 };
 
 module.exports = async (ctx, next) => {
diff --git a/test/middleware/header.js b/test/middleware/header.js
index 69a0c23a3..41b69dc7e 100644
--- a/test/middleware/header.js
+++ b/test/middleware/header.js
@@ -14,7 +14,7 @@ describe('header', () => {
         expect(response.headers['access-control-allow-headers']).toBe('Content-Type, Content-Length, Authorization, Accept, X-Requested-With');
         expect(response.headers['access-control-allow-methods']).toBe('GET');
         expect(response.headers['content-type']).toBe('application/xml; charset=utf-8');
-        expect(response.headers['cache-control']).toBe(`max-age=${config.cacheExpire / 2}`);
+        expect(response.headers['cache-control']).toBe(`max-age=${config.cacheExpire}`);
         expect(response.headers['last-modified']).toBe(response.text.match(/<lastBuildDate>(.*)<\/lastBuildDate>/)[1]);
         // expect(response.headers.etag).toBe('"b37-MORyrF0tJ8BFw0xLLZL/zBYAFPY"');
     });