diff --git a/icoconvert.py b/icoconvert.py
index 633646e..1f5a9da 100644
--- a/icoconvert.py
+++ b/icoconvert.py
@@ -131,7 +131,7 @@ def load_image(filename):
     image = PIL.Image.open(filename)
     (w, h) = image.size
     (new_w, new_h) = imagetools.fit_into_bounds(w, h, 256, 256, only_shrink=True)
-    image = image.resize((new_w, new_h), resample=PIL.Image.ANTIALIAS)
+    image = image.resize((new_w, new_h), resample=PIL.Image.LANCZOS)
     image = image.convert('RGBA')
     image = imagetools.pad_to_square(image)
     return image
diff --git a/resize.py b/resize.py
index 2bf00d9..f5d55b0 100644
--- a/resize.py
+++ b/resize.py
@@ -103,7 +103,7 @@ def resize(
             raise ValueError('Cannot overwrite input file without OUTPUT_INPLACE.')
 
     log.debug('Resizing %s to %dx%d.', file.absolute_path, width, height)
-    resampler = PIL.Image.NEAREST if nearest_neighbor else PIL.Image.ANTIALIAS
+    resampler = PIL.Image.NEAREST if nearest_neighbor else PIL.Image.LANCZOS
     image = image.resize( (width, height), resampler)
 
     if output_file.extension == '.jpg':