diff --git a/docs/docs/dev-server/cli-and-configuration.md b/docs/docs/dev-server/cli-and-configuration.md
index 61edbe824..1c0d89dd6 100644
--- a/docs/docs/dev-server/cli-and-configuration.md
+++ b/docs/docs/dev-server/cli-and-configuration.md
@@ -57,7 +57,7 @@ export default {
   open: true,
   nodeResolve: true,
   appIndex: 'demo/index.html'
-  // in a monorepo you need to set set the root dir to resolve modules
+  // in a monorepo you need to set the root dir to resolve modules
   rootDir: '../../',
 };
 ```
@@ -69,7 +69,7 @@ module.exports = {
   open: true,
   nodeResolve: true,
   appIndex: 'demo/index.html'
-  // in a monorepo you need to set set the root dir to resolve modules
+  // in a monorepo you need to set the root dir to resolve modules
   rootDir: '../../',
 };
 ```