diff --git a/gpu4pyscf/__init__.py b/gpu4pyscf/__init__.py
index 7fb02e52..ca735418 100644
--- a/gpu4pyscf/__init__.py
+++ b/gpu4pyscf/__init__.py
@@ -1,2 +1,2 @@
 from . import lib, grad, hessian, solvent, scf, dft
-__version__ = '0.6.3'
+__version__ = '0.6.4'