diff --git a/pyproject.toml b/pyproject.toml
index 5365b9f..7ce363a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "konoha"
-version = "5.5.5"
+version = "5.5.6a"
 description = "Add your description here"
 authors = [{ name = "himkt", email = "himkt@klis.tsukuba.ac.jp" }]
 dependencies = [