diff --git a/Cargo.lock b/Cargo.lock
index dadf26de..a4dfb96e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1579,7 +1579,7 @@ dependencies = [
 
 [[package]]
 name = "shadowsocks-rust"
-version = "1.12.0"
+version = "1.12.0-alpha.1"
 dependencies = [
  "byte_string",
  "byteorder",
diff --git a/Cargo.toml b/Cargo.toml
index 00989edd..3c7fcc36 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "shadowsocks-rust"
-version = "1.12.0"
+version = "1.12.0-alpha.1"
 authors = ["Shadowsocks Contributors"]
 description = "shadowsocks is a fast tunnel proxy that helps you bypass firewalls."
 repository = "https://github.com/shadowsocks/shadowsocks-rust"