diff --git a/config.js b/config.js
index 2b528ee7a..2239e88f0 100644
--- a/config.js
+++ b/config.js
@@ -1,8 +1,8 @@
 module.exports = {
     port: process.env.PORT || 1200,
-    cacheType: 'memory',      // support memory and redis, set empty to disable cache
-    cacheExpire: 5 * 60,
-    ua: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36',
+    cacheType: process.env.CACHE_TYPE || 'memory', // support memory and redis, set empty to disable cache
+    cacheExpire: process.env.CACHE_EXPIRE || 5 * 60,
+    ua: process.env.UA || 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36',
     pixiv: {
         client_id: 'MOBrBDS8blbauoSck0ZfDbtuzpyT',
         client_secret: 'lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj',