diff --git a/tidb-configuration-file.md b/tidb-configuration-file.md
index 49fb30aa87985..56c1913876366 100644
--- a/tidb-configuration-file.md
+++ b/tidb-configuration-file.md
@@ -274,6 +274,11 @@ Configuration items related to log files.
 
 Configuration items related to security.
 
+### `require-secure-transport`
+
+- Determines whether to require the client to use the secure mode for data transport.
+- Default value: `false`
+
 ### `enable-sem`
 
 - Enables the Security Enhanced Mode (SEM).