diff --git a/Cargo.toml b/Cargo.toml
index c401828..c630983 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ac-library-rs"
-version = "0.1.1"
+version = "0.2.0-alpha.1"
 edition = "2018"
 rust-version = "1.42"
 description = "A Rust port of AtCoder Library (ACL)."