diff --git a/rapids/models.py b/rapids/models.py
index 0a1fc425..c1f63bba 100644
--- a/rapids/models.py
+++ b/rapids/models.py
@@ -457,10 +457,11 @@ class RapidImage(models.Model):
         if self.image:
             # Try and read the file as a dicom
             try:
-                hash = ",".join(pydicom.dcmread(self.image).pixel_array.tostring())
+                hash = ",".join(pydicom.dcmread(self.image).pixel_array.to())
                 self.is_dicom = True
             except pydicom.errors.InvalidDicomError:
-                hash = hashlib.md5(self.image).hexdigest()
+                with self.image.open("r") as f:
+                    hash = hashlib.md5(f).hexdigest()
 
             self.image_md5_hash = hash
         super().save(*args, **kwargs)  # Call the "real" save() method.