diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f59e2f72f65..085e7af101b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,7 +1,7 @@
 # Contribution Guide
 
 If you have any comment or advice, please report your [issue](https://github.com/antvis/x6/issues),
-or make any change as you wish and submit an [PR](https://github.com/antvis/x6/pulls).
+or make any change as you wish and submit a [PR](https://github.com/antvis/x6/pulls).
 
 ## Reporting New Issues