diff --git a/Cargo.toml b/Cargo.toml
index 74d9f43..6fd734c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 edition = "2018"
 name = "poston"
-version = "0.3.3-alpha.0"
+version = "0.3.3"
 authors = ["Takeru Sato <type.in.type@gmail.com>"]
 description = "Yet another Fluentd logger for Rust"
 documentation = "https://github.com/tkrs/poston"