diff --git a/optuna_integration/version.py b/optuna_integration/version.py
index 819e85a6..51f547f0 100644
--- a/optuna_integration/version.py
+++ b/optuna_integration/version.py
@@ -1 +1 @@
-__version__ = "4.6.0.dev"
+__version__ = "4.7.0.dev"