diff --git a/Cargo.lock b/Cargo.lock
index 5f3072e..e81fe64 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -284,7 +284,7 @@ dependencies = [
 
 [[package]]
 name = "database-tree"
-version = "0.1.0-alpha.1"
+version = "0.1.0-alpha.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -503,7 +503,7 @@ dependencies = [
 
 [[package]]
 name = "gobang"
-version = "0.1.0-alpha.1"
+version = "0.1.0-alpha.2"
 dependencies = [
  "anyhow",
  "async-trait",
diff --git a/Cargo.toml b/Cargo.toml
index 2a18806..4c463a4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "gobang"
-version = "0.1.0-alpha.1"
+version = "0.1.0-alpha.2"
 authors = ["Takayuki Maeda <takoyaki0316@gmail.com>"]
 edition = "2018"
 license = "MIT"
@@ -28,7 +28,7 @@ serde = "1.0"
 toml = "0.4"
 strum = "0.21"
 strum_macros = "0.21"
-database-tree = { path = "./database-tree", version = "0.1.0-alpha.1" }
+database-tree = { path = "./database-tree", version = "0.1.0-alpha.2" }
 easy-cast = "0.4"
 async-trait = "0.1.50"
 itertools = "0.10.0"
diff --git a/README.md b/README.md
index b9cc7ed..e56bff8 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ A cross-platform TUI database management tool written in Rust
 If you already have a Rust environment set up, you can use the `cargo install` command:
 
 ```
-$ cargo install --version 0.1.0-alpha.1 gobang
+$ cargo install --version 0.1.0-alpha.2 gobang
 ```
 
 ## Usage
diff --git a/database-tree/Cargo.toml b/database-tree/Cargo.toml
index 4fe9498..4f7f7ec 100644
--- a/database-tree/Cargo.toml
+++ b/database-tree/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "database-tree"
-version = "0.1.0-alpha.1"
+version = "0.1.0-alpha.2"
 authors = ["Takayuki Maeda <takoyaki0316@gmail.com>"]
 edition = "2018"
 license = "MIT"