diff --git a/oml/media/epub.py b/oml/media/epub.py
index 552a134..92ab289 100644
--- a/oml/media/epub.py
+++ b/oml/media/epub.py
@@ -68,17 +68,17 @@ def cover(path):
         if manifest:
             manifest = manifest[0]
         if metadata and manifest:
-            for e in metadata.getchildren():
+            for e in list(metadata):
                 if e.tag == '{http://www.idpf.org/2007/opf}meta' and e.attrib.get('name') == 'cover':
                     cover_id = e.attrib['content']
-                    for e in manifest.getchildren():
+                    for e in list(manifest):
                         if e.attrib['id'] == cover_id:
                             filename = unquote(e.attrib['href'])
                             filename = normpath(os.path.join(os.path.dirname(opf[0]), filename))
                             if filename in files:
                                 return use(filename)
         if manifest:
-            images = [e for e in manifest.getchildren() if 'image' in e.attrib['media-type']]
+            images = [e for e in list(manifest) if 'image' in e.attrib['media-type']]
             if images:
                 image_data = []
                 for e in images:
@@ -89,7 +89,7 @@ def cover(path):
                 if image_data:
                     image_data.sort(key=lambda name: z.getinfo(name).file_size)
                     return use(image_data[-1])
-            for e in manifest.getchildren():
+            for e in list(manifest):
                 if 'html' in e.attrib['media-type']:
                     filename = unquote(e.attrib['href'])
                     filename = normpath(os.path.join(os.path.dirname(opf[0]), filename))
@@ -118,7 +118,7 @@ def info(epub):
         metadata = info.findall('{http://www.idpf.org/2007/opf}metadata')
         if metadata:
             metadata = metadata[0]
-            for e in metadata.getchildren():
+            for e in list(metadata):
                 if e.text and e.text.strip() and e.text not in ('unknown', 'none'):
                     key = e.tag.split('}')[-1]
                     key = {
@@ -148,7 +148,7 @@ def info(epub):
                 for point in nav_map.findall('{http://www.daisy.org/z3986/2005/ncx/}navPoint'):
                     label = point.find('{http://www.daisy.org/z3986/2005/ncx/}navLabel')
                     if label:
-                        txt = label.getchildren()[0].text
+                        txt = list(label)[0].text
                         if txt:
                             contents.append(txt)
                 if contents: