diff --git a/free-programming-books-zh.md b/free-programming-books-zh.md
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@@ -369,7 +369,6 @@
 ### Elasticsearch
 
 * [Elasticsearch 权威指南](https://github.com/looly/elasticsearch-definitive-guide-cn) （《Elasticsearch the definitive guide》中文版）
-* [ELKstack 中文指南](http://kibana.logstash.es)
 * [Mastering Elasticsearch(中文版)](http://udn.yyuap.com/doc/mastering-elasticsearch/)