diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 8208d097..35411e7d 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "doccano"
-version = "1.8.3"
+version = "1.8.4"
 description = "doccano, text annotation tool for machine learning practitioners"
 authors = ["Hironsan <hiroki.nakayama.py@gmail.com>"]
 license = "MIT"