diff --git a/README.OpenSource b/README.OpenSource
index 0dc5717b5b95b655d5e69f73156367b57e318285..065260e674fdca80e8c5a6b79db3e232fb71923d 100644
--- a/README.OpenSource
+++ b/README.OpenSource
@@ -3,7 +3,7 @@
         "Name": "css-what",
         "License": "BSD 2-Clause License",
         "License File": "LICENSE",
-        "Version Number": "2.1.3",
+        "Version Number": "v6.1.0",
         "Owner": "lixingchi1@huawei.com",
         "Upstream URL": "https://github.com/fb55/css-what",
         "Description": "a CSS selector parser."