diff --git a/README.md b/README.md
index ee9284332a9be..daf0c159287c2 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,7 @@ Currently, we maintain the following versions of TiDB documentation in different
 | Branch name | TiDB docs version |
 | :---------|:----------|
 | [`master`](https://github.com/pingcap/docs/tree/master) | The latest development version |
+| [`release-5.3`](https://github.com/pingcap/docs/tree/release-5.3) | 5.3 stable version |
 | [`release-5.2`](https://github.com/pingcap/docs/tree/release-5.2) | 5.2 stable version |
 | [`release-5.1`](https://github.com/pingcap/docs/tree/release-5.1) | 5.1 stable version |
 | [`release-5.0`](https://github.com/pingcap/docs/tree/release-5.0) | 5.0 stable version |
diff --git a/connectors-and-apis.md b/connectors-and-apis.md
index b243671b1f2cc..337d0b60521ac 100644
--- a/connectors-and-apis.md
+++ b/connectors-and-apis.md
@@ -74,6 +74,7 @@ The third-party APIs are not developed by Oracle. The following table lists the
 | Ruby           | MySQL/Ruby                               | `libmysqlclient`                 | Uses `libmysqlclient`. See [Section 27.12.1, “The MySQL/Ruby API”](https://dev.mysql.com/doc/refman/5.7/en/apis-ruby-mysqlruby.html) |
 |                | Ruby/MySQL                               | Native Driver                    | See [Section 27.12.2, “The Ruby/MySQL API”](https://dev.mysql.com/doc/refman/5.7/en/apis-ruby-rubymysql.html) |
 | Scheme         | `Myscsh`                                 | `libmysqlclient`                 | See [`Myscsh`](https://github.com/aehrisch/myscsh) |
+| SPL            | `sql_mysql`                              | `libmysqlclient`                 | See `sql_mysql` for SPL |
 | Tcl            | MySQLtcl                                 | `libmysqlclient`                 | See [Section 27.13, “MySQL Tcl API”](https://dev.mysql.com/doc/refman/5.7/en/apis-tcl.html) |
 
 ## Connector versions supported by TiDB