diff --git a/src/ptbench/models/pasa.py b/src/ptbench/models/pasa.py
index e2cb9b053a57c6c3a786c19c4cb47a99e8d5cddb..650aa7d4f60dfe5feda914deb8518415fda8876d 100644
--- a/src/ptbench/models/pasa.py
+++ b/src/ptbench/models/pasa.py
@@ -73,7 +73,8 @@ class Pasa(pl.LightningModule):
         self.name = "pasa"
 
         self.model_transforms = [
-            torchvision.transforms.Resize(512),
+            torchvision.transforms.Grayscale(),
+            torchvision.transforms.Resize(512, antialias=True),
         ]
 
         self._train_loss = train_loss