diff --git a/src/qutip_tensornetwork/core/data/network.py b/src/qutip_tensornetwork/core/data/network.py
index 11ae241..8c7ff78 100644
--- a/src/qutip_tensornetwork/core/data/network.py
+++ b/src/qutip_tensornetwork/core/data/network.py
@@ -28,6 +28,7 @@
 
 __all__ = ["Network"]
 
+
 class Network(qutip.core.data.Data):
     """Represents arbitrary quantum objects as tensor networks.