diff --git a/pyproject.toml b/pyproject.toml
index 1451506..eb98b5d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "east_asian_spacing"
-version = "1.2.0.dev0"
+version = "1.2.1"
 description = "East Asian Contextual Spacing Build Tools"
 authors = ["Koji Ishii <kojii@chromium.org>"]
 readme = "README.md"