diff --git a/optuna_dashboard/__init__.py b/optuna_dashboard/__init__.py
index b6cc2685..a4819ac8 100644
--- a/optuna_dashboard/__init__.py
+++ b/optuna_dashboard/__init__.py
@@ -2,4 +2,4 @@ from ._app import run_server  # noqa
 from ._app import wsgi  # noqa
 
 
-__version__ = "0.6.3"
+__version__ = "0.6.4"