diff --git a/pyproject.toml b/pyproject.toml
index 4375dd5..c99fb15 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "multicsv"
-version = "1.0.3"
+version = "1.0.4"
 description = "A Python library for handling multi-CSV format."
 readme = "README.md"
 license = "GPL-3.0"