diff --git a/README.md b/README.md
index 1acd578..ff92b8c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
+Version 3.23.12
+   
+Resolved Issues:
+
+1. Fix the bug of inconsistent contentType when uploading folders using the putFile method
+
+------------------------------------------------------------------------------------------------- 
 Version 3.23.9
 
 New Features:
diff --git a/README_CN.md b/README_CN.md
index 3a1adbc..a983f0c 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -1,4 +1,11 @@
-Version 3.23.9
+Version 3.23.12
+
+修复问题
+
+1. 修复putFile上传文件夹时可能导致contentType不一致问题。
+
+-------------------------------------------------------------------------------------------------
+Version 3.23.9
 新特性：
 1. setBucketLifecycle接口支持设置桶碎片的过期时间。