diff --git a/types/hexo-log/index.d.ts b/types/hexo-log/index.d.ts
index bbd18bbb39..07a5b74ede 100644
--- a/types/hexo-log/index.d.ts
+++ b/types/hexo-log/index.d.ts
@@ -2,6 +2,7 @@
 // Project: http://hexo.io/
 // Definitions by: segayuu <https://github.com/segayuu>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
 
 import bunyan = require('hexo-bunyan');
 import streams = require('stream');