diff --git a/Cargo.toml b/Cargo.toml
index 547703d..31003f6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "sibling"
-version = "2.0.0-beta-1"
+version = "2.0.0-beta-6"
 description = "get next/previous sibling directory name."
 repository = "https://github.com/tamada/sibling"
 homepage = "https://tamada.github.io/sibling"
diff --git a/docs/config.toml b/docs/config.toml
index 6c444f3..b22ea60 100644
--- a/docs/config.toml
+++ b/docs/config.toml
@@ -15,7 +15,7 @@ pygmentsStyle = "pygments"
     project_tagline = "get next/previous sibling directory name"
     dateFormat = "2006-01-02"
     katex = true
-    version = "2.0.0-beta-5"
+    version = "2.0.0-beta-6"
     footer = "[![GitHub](https://img.shields.io/badge/GitHub-tamada/sibling-blueviolet.svg?logo=github)](https://github.com/tamada/sibling) Made with [Hugo](https://gohugo.io/). Theme by [Cayman](https://github.com/zwbetz-gh/cayman-hugo-theme). Deployed to [GitHub Pages](https://pages.github.com/)."
 
 [menu]