diff --git a/pyproject.toml b/pyproject.toml
index ad3b7e8..2f5beba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "async-pixiv"
-version = "1.0.0"
+version = "1.0.0a"
 description = "Async Pixiv API for Python"
 authors = [
     { name = "Arko", email = "arko.space.cc@gmail.com" },