diff --git a/book.json b/book.json
index 9af5ab2..a97a009 100644
--- a/book.json
+++ b/book.json
@@ -43,7 +43,7 @@
"className": "atoc"
},
"tbfed-pagefooter": {
- "copyright": "渝ICP备16001958号 | Copyright © 2020 apache-druid.cn",
+ "copyright": "渝ICP备16001958号 | Copyright © 2020 apache-druid.cn",
"modify_label": "最近一次修改时间:",
"modify_format": "YYYY-MM-DD HH:mm:ss"
}