diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 ## GitHub Actions for GitHub Pages
 
 This is a **GitHub Action** to deploy your static files to **GitHub Pages**.
-This deploy action can be combined simply and freely with [Static Site Generators]. (Hugo, MkDocs, Gatsby, GitBook, etc.)
+This deploy action can be combined simply and freely with [Static Site Generators]. (Hugo, MkDocs, Gatsby, GitBook, mdBook, etc.)
 
 [Static Site Generators]: https://www.staticgen.com/