diff --git a/docs-cn/04-connect/_connect_r.mdx b/docs-cn/04-connect/_connect_r.mdx
index 08346993e4c94e769fc294a6f06a579c6ca3a789..076cbf667031944e870cdfc0101c6028d0f96f5c 100644
--- a/docs-cn/04-connect/_connect_r.mdx
+++ b/docs-cn/04-connect/_connect_r.mdx
@@ -1,4 +1,4 @@
-```R
+```r
 > library("DBI")
 > library("rJava")
 > library("RJDBC")
diff --git a/docs-cn/04-connect/index.mdx b/docs-cn/04-connect/index.mdx
index d8ac84f3362faa80a5303e5713058c235312bf87..f861bdc78e89efd7a96147768f8a5a22da58665c 100644
--- a/docs-cn/04-connect/index.mdx
+++ b/docs-cn/04-connect/index.mdx
@@ -130,7 +130,7 @@ dotnet add package TDengine.Connector
 <TabItem label="R" value="r">
 
 首先系统上要有 TDeninge 客户端驱动，安装目录下有`connector/jdbc/taos-jdbcdriver-xxx-dist.jar`。然后需要安装 R 的依赖包`RJDBC`：
-```R
+```r
 install.packages("RJDBC")
 ```