diff --git a/README.md b/README.md
index a780575..8b58485 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ irm https://d2learn.org/xlings-install.ps1.txt | iex
 ```bash
 xlings install d2x:mcpp-standard
 cd mcpp-standard
-d2x checker
+xlings d2x checker
 ```
 
 **👉 [more details...](https://sunrisepeak.github.io/mcpp-standard/base/chapter_1.html)**
diff --git a/README.zh.md b/README.zh.md
index d9caed5..f22b6b8 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -69,7 +69,7 @@ irm https://d2learn.org/xlings-install.ps1.txt | iex
 ```bash
 xlings install d2x:mcpp-standard
 cd mcpp-standard
-d2x checker
+xlings d2x checker
 ```
 
 **👉 [更多细节...](https://sunrisepeak.github.io/mcpp-standard/base/chapter_1.html)**