diff --git a/map2map/data/fields.py b/map2map/data/fields.py
index b1481da..9db64f7 100644
--- a/map2map/data/fields.py
+++ b/map2map/data/fields.py
@@ -149,22 +149,23 @@ def crop(fields, start, crop, pad, scale_factor=1):
     new_fields = []
     for x in fields:
         for d, (i, N, (p0, p1)) in enumerate(zip(start, crop, pad)):
-            start, stop = i - p0, i + N + p1
+            begin, stop = i - p0, i + N + p1
 
             if scale_factor > 1:  # add buffer for linear interpolation
-                start, stop = start - 1, stop + 1
+                begin, stop = begin - 1, stop + 1
 
-            x = x.take(range(start, stop), axis=1 + d, mode='wrap')
+            x = x.take(range(begin, stop), axis=1 + d, mode='wrap')
 
         if scale_factor > 1:
+            x = np.expand_dims(x,axis=0)
             x = torch.from_numpy(x)
             x = F.interpolate(x, scale_factor=scale_factor, mode='trilinear')
-            x = x.numpy()
+            x = x[0].numpy()
 
             # remove buffer
             for d, (N, (p0, p1)) in enumerate(zip(crop, pad)):
-                start, stop = scale_factor, N + p0 + p1 - scale_factor
-                x = x.take(range(start, stop), axis=1 + d)
+                begin, stop = scale_factor, N + p0 + p1 - scale_factor
+                x = x.take(range(begin, stop), axis=1 + d)
 
         new_fields.append(x)