diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4302a58..30a9254 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # CHANGELOG
 
-## 0.9.0 (Unreleased)
+## 0.10.0 (Unreleased)
+
+## 0.9.0
 
 ### Important Changes
 
diff --git a/Cargo.toml b/Cargo.toml
index 01c0263..e990fdf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace.package]
-version = "0.9.0"
+version = "0.9.0-alpha.1"
 authors = ["Jun Kurihara"]
 homepage = "https://github.com/junkurihara/rust-rpxy"
 repository = "https://github.com/junkurihara/rust-rpxy"