diff --git a/pyproject.toml b/pyproject.toml
index d63321c..3289d62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "labelu"
-version = ''
+version = '1.0.0-alpha.28'
 description = ""
 license = "Apache-2.0"
 authors = ["pengjinhu <pengjinhu@pjlab.org.cn>"]