diff --git a/app/src/main/java/io/legado/app/lib/README.md b/app/src/main/java/io/legado/app/lib/README.md
index b6375d25c..de7b7bd78 100644
--- a/app/src/main/java/io/legado/app/lib/README.md
+++ b/app/src/main/java/io/legado/app/lib/README.md
@@ -1,4 +1,6 @@
 # 放置一些copy过来的库
 * dialogs 弹出框
+* icu4j 编码识别库
+* permission 权限申请库
 * theme 主题
 * webDav 网络存储
\ No newline at end of file