A snippet of Django's settings.py with django-htmlmin enabled.

settings.py

MIDDLEWARE_CLASSES = (
    'django.middleware.gzip.GZipMiddleware',
    'htmlmin.middleware.HtmlMinifyMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
)