diff --git a/magvit2_pytorch/magvit2_pytorch.py b/magvit2_pytorch/magvit2_pytorch.py
index d48cd98..dee5845 100644
--- a/magvit2_pytorch/magvit2_pytorch.py
+++ b/magvit2_pytorch/magvit2_pytorch.py
@@ -889,7 +889,7 @@ def __init__(
         perceptual_loss_weight = 1.,
         antialiased_downsample = True,
         discr_kwargs: Optional[dict] = None,
-        multiscale_discrs: Optional[Tuple[Module, ...]] = None,
+        multiscale_discrs: Tuple[Module, ...] = tuple(),
         use_gan = True,
         adversarial_loss_weight = 1.,
         grad_penalty_loss_weight = 10.,
diff --git a/magvit2_pytorch/version.py b/magvit2_pytorch/version.py
index 5f0b241..fa51611 100644
--- a/magvit2_pytorch/version.py
+++ b/magvit2_pytorch/version.py
@@ -1 +1 @@
-__version__ = '0.0.53'
+__version__ = '0.0.54'