diff --git a/tianshou/__init__.py b/tianshou/__init__.py
index 3430fb0..bc61c15 100644
--- a/tianshou/__init__.py
+++ b/tianshou/__init__.py
@@ -1,6 +1,6 @@
 from tianshou import data, env, exploration, policy, trainer, utils
 
-__version__ = "0.4.3"
+__version__ = "0.4.4"
 
 __all__ = [
     "env",