PowerDNS-Admin broken

[lkraider]

Trying to launch the image, it has an error:

Traceback (most recent call last):
  File "create_db.py", line 6, in <module>
    from app import db
  File "/app/app/__init__.py", line 1, in <module>
    from werkzeug.contrib.fixers import ProxyFix
ImportError: No module named contrib.fixers

Maybe syncing with upstream is the best choice?
https://github.com/ngoduykhanh/PowerDNS-Admin