diff --git a/check_process b/check_process
index f203cb1..b300842 100644
--- a/check_process
+++ b/check_process
@@ -21,7 +21,7 @@
 		setup_public=1
 		upgrade=1
 		# latest published in community.json
-		upgrade=1		from_commit=74f93c22e57e0174f67b570875c9e10bbca0a6c8
+		upgrade=1		from_commit=dc037965b0fbc1bd59d352c4d2b71a97b1e4768f
 		backup_restore=1
 		multi_instance=1
 		incorrect_path=1
diff --git a/conf/settings_history/settings.2.20.py b/conf/settings_history/settings.2.20.py
new file mode 100644
index 0000000..80f7de6
--- /dev/null
+++ b/conf/settings_history/settings.2.20.py
@@ -0,0 +1,708 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright © 2012 - 2017 Michal Čihař <michal@cihar.com>
+#
+# This file is part of Weblate <https://weblate.org/>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+from __future__ import unicode_literals
+import platform
+import os
+from logging.handlers import SysLogHandler
+
+#
+# Django settings for Weblate project.
+#
+
+DEBUG = False
+
+ADMINS = (
+    ('__ADMIN__', '__ADMINMAIL__'),
+)
+
+MANAGERS = ADMINS
+
+DATABASES = {
+    'default': {
+        # Database engine
+        'ENGINE': 'django.db.backends.postgresql_psycopg2',
+        # Database name
+        'NAME': '__NAME__',
+        # Database user
+        'USER': '__NAME__',
+        # Database password
+        'PASSWORD': '__DB_PWD__',
+        # Set to empty string for localhost
+        'HOST': 'localhost',
+        # Set to empty string for default
+        'PORT': '5432',
+    }
+}
+
+BASE_DIR = '__FINALPATH__'
+
+# Data directory
+DATA_DIR = os.path.join(BASE_DIR, 'data')
+
+# Local time zone for this installation. Choices can be found here:
+# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
+# although not all choices may be available on all operating systems.
+# In a Windows environment this must be set to your system time zone.
+TIME_ZONE = 'UTC'
+
+# Language code for this installation. All choices can be found here:
+# http://www.i18nguy.com/unicode/language-identifiers.html
+LANGUAGE_CODE = 'en-us'
+
+LANGUAGES = (
+    ('az', 'Azərbaycan'),
+    ('be', 'Беларуская'),
+    ('be@latin', 'Biełaruskaja'),
+    ('bg', 'Български'),
+    ('br', 'Brezhoneg'),
+    ('ca', 'Català'),
+    ('cs', 'Čeština'),
+    ('da', 'Dansk'),
+    ('de', 'Deutsch'),
+    ('en', 'English'),
+    ('en-gb', 'English (United Kingdom)'),
+    ('el', 'Ελληνικά'),
+    ('es', 'Español'),
+    ('fi', 'Suomi'),
+    ('fr', 'Français'),
+    ('fy', 'Frysk'),
+    ('gl', 'Galego'),
+    ('he', 'עברית'),
+    ('hu', 'Magyar'),
+    ('id', 'Indonesia'),
+    ('it', 'Italiano'),
+    ('ja', '日本語'),
+    ('ko', '한국어'),
+    ('ksh', 'Kölsch'),
+    ('nb', 'Norsk bokmål'),
+    ('nl', 'Nederlands'),
+    ('pl', 'Polski'),
+    ('pt', 'Português'),
+    ('pt-br', 'Português brasileiro'),
+    ('ru', 'Русский'),
+    ('sk', 'Slovenčina'),
+    ('sl', 'Slovenščina'),
+    ('sr', 'Српски'),
+    ('sv', 'Svenska'),
+    ('tr', 'Türkçe'),
+    ('uk', 'Українська'),
+    ('zh-hans', '简体字'),
+    ('zh-hant', '正體字'),
+)
+
+SITE_ID = 1
+
+# If you set this to False, Django will make some optimizations so as not
+# to load the internationalization machinery.
+USE_I18N = True
+
+# If you set this to False, Django will not format dates, numbers and
+# calendars according to the current locale.
+USE_L10N = True
+
+# If you set this to False, Django will not use timezone-aware datetimes.
+USE_TZ = True
+
+# URL prefix to use, please see documentation for more details
+URL_PREFIX = '__PATHURL__'
+
+# Absolute filesystem path to the directory that will hold user-uploaded files.
+# Example: "/home/media/media.lawrence.com/media/"
+MEDIA_ROOT = os.path.join(DATA_DIR, 'media')
+
+# URL that handles the media served from MEDIA_ROOT. Make sure to use a
+# trailing slash.
+# Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
+MEDIA_URL = '{0}/media/'.format(URL_PREFIX)
+
+# Absolute path to the directory static files should be collected to.
+# Don't put anything in this directory yourself; store your static files
+# in apps' "static/" subdirectories and in STATICFILES_DIRS.
+# Example: "/home/media/media.lawrence.com/static/"
+STATIC_ROOT = os.path.join(DATA_DIR, 'static')
+
+# URL prefix for static files.
+# Example: "http://media.lawrence.com/static/"
+STATIC_URL = '{0}/static/'.format(URL_PREFIX)
+
+# Additional locations of static files
+STATICFILES_DIRS = (
+    # Put strings here, like "/home/html/static" or "C:/www/django/static".
+    # Always use forward slashes, even on Windows.
+    # Don't forget to use absolute paths, not relative paths.
+)
+
+# List of finder classes that know how to find static files in
+# various locations.
+STATICFILES_FINDERS = (
+    'django.contrib.staticfiles.finders.FileSystemFinder',
+    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
+    'compressor.finders.CompressorFinder',
+)
+
+# Make this unique, and don't share it with anybody.
+# You can generate it using examples/generate-secret-key
+SECRET_KEY = '__KEY__'  # noqa
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [
+            os.path.join(BASE_DIR, 'templates'),
+        ],
+        'OPTIONS': {
+            'context_processors': [
+                'django.contrib.auth.context_processors.auth',
+                'django.template.context_processors.debug',
+                'django.template.context_processors.i18n',
+                'django.template.context_processors.request',
+                'django.template.context_processors.csrf',
+                'django.contrib.messages.context_processors.messages',
+                'weblate.trans.context_processors.weblate_context',
+            ],
+            'loaders': [
+                ('django.template.loaders.cached.Loader', [
+                    'django.template.loaders.filesystem.Loader',
+                    'django.template.loaders.app_directories.Loader',
+                ]),
+            ],
+        },
+    },
+]
+
+
+# GitHub username for sending pull requests.
+# Please see the documentation for more details.
+GITHUB_USERNAME = "__GITHUBUSER__"
+
+# Authentication configuration
+AUTHENTICATION_BACKENDS = (
+    'social_core.backends.email.EmailAuth',
+    # 'social_core.backends.google.GoogleOAuth2',
+    # 'social_core.backends.github.GithubOAuth2',
+    # 'social_core.backends.bitbucket.BitbucketOAuth',
+    'social_core.backends.suse.OpenSUSEOpenId',
+    'social_core.backends.ubuntu.UbuntuOpenId',
+    'social_core.backends.fedora.FedoraOpenId',
+    # 'social_core.backends.facebook.FacebookOAuth2',
+    'weblate.accounts.auth.WeblateUserBackend',
+)
+
+# Social auth backends setup
+SOCIAL_AUTH_GITHUB_KEY = ''
+SOCIAL_AUTH_GITHUB_SECRET = ''
+SOCIAL_AUTH_GITHUB_SCOPE = ['user:email']
+
+SOCIAL_AUTH_BITBUCKET_KEY = ''
+SOCIAL_AUTH_BITBUCKET_SECRET = ''
+SOCIAL_AUTH_BITBUCKET_VERIFIED_EMAILS_ONLY = True
+
+SOCIAL_AUTH_FACEBOOK_KEY = ''
+SOCIAL_AUTH_FACEBOOK_SECRET = ''
+SOCIAL_AUTH_FACEBOOK_SCOPE = ['email', 'public_profile']
+
+SOCIAL_AUTH_GOOGLE_OAUTH2_KEY = ''
+SOCIAL_AUTH_GOOGLE_OAUTH2_SECRET = ''
+
+# Social auth settings
+SOCIAL_AUTH_PIPELINE = (
+    'social_core.pipeline.social_auth.social_details',
+    'social_core.pipeline.social_auth.social_uid',
+    'social_core.pipeline.social_auth.auth_allowed',
+    'social_core.pipeline.social_auth.social_user',
+    'weblate.accounts.pipeline.store_params',
+    'weblate.accounts.pipeline.verify_open',
+    'social_core.pipeline.user.get_username',
+    'weblate.accounts.pipeline.require_email',
+    'social_core.pipeline.mail.mail_validation',
+    'weblate.accounts.pipeline.revoke_mail_code',
+    'weblate.accounts.pipeline.ensure_valid',
+    'weblate.accounts.pipeline.remove_account',
+    'social_core.pipeline.social_auth.associate_by_email',
+    'weblate.accounts.pipeline.reauthenticate',
+    'weblate.accounts.pipeline.verify_username',
+    'social_core.pipeline.user.create_user',
+    'social_core.pipeline.social_auth.associate_user',
+    'social_core.pipeline.social_auth.load_extra_data',
+    'weblate.accounts.pipeline.cleanup_next',
+    'weblate.accounts.pipeline.user_full_name',
+    'weblate.accounts.pipeline.store_email',
+    'weblate.accounts.pipeline.notify_connect',
+    'weblate.accounts.pipeline.password_reset',
+)
+SOCIAL_AUTH_DISCONNECT_PIPELINE = (
+    'social_core.pipeline.disconnect.allowed_to_disconnect',
+    'social_core.pipeline.disconnect.get_entries',
+    'social_core.pipeline.disconnect.revoke_tokens',
+    'weblate.accounts.pipeline.cycle_session',
+    'weblate.accounts.pipeline.adjust_primary_mail',
+    'weblate.accounts.pipeline.notify_disconnect',
+    'social_core.pipeline.disconnect.disconnect',
+    'weblate.accounts.pipeline.cleanup_next',
+)
+
+# Custom authentication strategy
+SOCIAL_AUTH_STRATEGY = 'weblate.accounts.strategy.WeblateStrategy'
+
+# Raise exceptions so that we can handle them later
+SOCIAL_AUTH_RAISE_EXCEPTIONS = True
+
+SOCIAL_AUTH_EMAIL_VALIDATION_FUNCTION = \
+    'weblate.accounts.pipeline.send_validation'
+SOCIAL_AUTH_EMAIL_VALIDATION_URL = \
+    '{0}/accounts/email-sent/'.format(URL_PREFIX)
+SOCIAL_AUTH_LOGIN_ERROR_URL = \
+    '{0}/accounts/login/'.format(URL_PREFIX)
+SOCIAL_AUTH_EMAIL_FORM_URL = \
+    '{0}/accounts/email/'.format(URL_PREFIX)
+SOCIAL_AUTH_NEW_ASSOCIATION_REDIRECT_URL = \
+    '{0}/accounts/profile/#auth'.format(URL_PREFIX)
+SOCIAL_AUTH_PROTECTED_USER_FIELDS = ('email',)
+SOCIAL_AUTH_SLUGIFY_USERNAMES = True
+SOCIAL_AUTH_SLUGIFY_FUNCTION = 'weblate.accounts.pipeline.slugify_username'
+
+# Password validation configuration
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+        'OPTIONS': {
+            'min_length': 6,
+        }
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+    {
+        'NAME': 'weblate.accounts.password_validation.CharsPasswordValidator',
+    },
+    {
+        'NAME': 'weblate.accounts.password_validation.PastPasswordsValidator',
+    },
+    # Optional password strength validation by django-zxcvbn-password
+    # {
+    #     'NAME': 'zxcvbn_password.ZXCVBNValidator',
+    #     'OPTIONS': {
+    #         'min_score': 3,
+    #         'user_attributes': ('username', 'email', 'first_name')
+    #     }
+    # },
+]
+
+# Middleware
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.locale.LocaleMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'weblate.accounts.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'social_django.middleware.SocialAuthExceptionMiddleware',
+    'weblate.accounts.middleware.RequireLoginMiddleware',
+    'weblate.middleware.SecurityMiddleware',
+]
+
+ROOT_URLCONF = 'weblate.urls'
+
+# Django and Weblate apps
+INSTALLED_APPS = (
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.sites',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'django.contrib.admin.apps.SimpleAdminConfig',
+    'django.contrib.admindocs',
+    'django.contrib.sitemaps',
+    'social_django',
+    'crispy_forms',
+    'compressor',
+    'rest_framework',
+    'rest_framework.authtoken',
+    'weblate.trans',
+    'weblate.lang',
+    'weblate.permissions',
+    'weblate.screenshots',
+    'weblate.accounts',
+    'weblate.utils',
+    'weblate.wladmin',
+    'weblate',
+
+    # Optional: Git exporter
+    # 'weblate.gitexport',
+)
+
+# Path to locales
+LOCALE_PATHS = (os.path.join(BASE_DIR, 'weblate', 'locale'), )
+
+# Custom exception reporter to include some details
+DEFAULT_EXCEPTION_REPORTER_FILTER = \
+    'weblate.trans.debug.WeblateExceptionReporterFilter'
+
+# Default logging of Weblate messages
+# - to syslog in production (if available)
+# - otherwise to console
+# - you can also choose 'logfile' to log into separate file
+#   after configuring it below
+
+# Detect if we can connect to syslog
+HAVE_SYSLOG = False
+if platform.system() != 'Windows':
+    try:
+        handler = SysLogHandler(
+            address='/dev/log', facility=SysLogHandler.LOG_LOCAL2
+        )
+        handler.close()
+        HAVE_SYSLOG = True
+    except IOError:
+        HAVE_SYSLOG = False
+
+if DEBUG or not HAVE_SYSLOG:
+    DEFAULT_LOG = 'console'
+else:
+    DEFAULT_LOG = 'syslog'
+
+# A sample logging configuration. The only tangible logging
+# performed by this configuration is to send an email to
+# the site admins on every HTTP 500 error when DEBUG=False.
+# See http://docs.djangoproject.com/en/stable/topics/logging for
+# more details on how to customize your logging configuration.
+LOGGING = {
+    'version': 1,
+    'disable_existing_loggers': False,
+    'filters': {
+        'require_debug_false': {
+            '()': 'django.utils.log.RequireDebugFalse'
+        }
+    },
+    'formatters': {
+        'syslog': {
+            'format': 'weblate[%(process)d]: %(levelname)s %(message)s'
+        },
+        'simple': {
+            'format': '%(levelname)s %(message)s'
+        },
+        'logfile': {
+            'format': '%(asctime)s %(levelname)s %(message)s'
+        },
+    },
+    'handlers': {
+        'mail_admins': {
+            'level': 'ERROR',
+            'filters': ['require_debug_false'],
+            'class': 'django.utils.log.AdminEmailHandler',
+            'include_html': True,
+        },
+        'console': {
+            'level': 'DEBUG',
+            'class': 'logging.StreamHandler',
+            'formatter': 'simple'
+        },
+        'syslog': {
+            'level': 'DEBUG',
+            'class': 'logging.handlers.SysLogHandler',
+            'formatter': 'syslog',
+            'address': '/dev/log',
+            'facility': SysLogHandler.LOG_LOCAL2,
+        },
+        # Logging to a file
+        # 'logfile': {
+        #     'level':'DEBUG',
+        #     'class':'logging.handlers.RotatingFileHandler',
+        #     'filename': "/var/log/weblate/weblate.log",
+        #     'maxBytes': 100000,
+        #     'backupCount': 3,
+        #     'formatter': 'logfile',
+        # },
+    },
+    'loggers': {
+        'django.request': {
+            'handlers': ['mail_admins', DEFAULT_LOG],
+            'level': 'ERROR',
+            'propagate': True,
+        },
+        # Logging database queries
+        # 'django.db.backends': {
+        #     'handlers': [DEFAULT_LOG],
+        #     'level': 'DEBUG',
+        # },
+        'weblate': {
+            'handlers': [DEFAULT_LOG],
+            'level': 'DEBUG',
+        },
+        # Logging VCS operations
+        # 'weblate-vcs': {
+        #     'handlers': [DEFAULT_LOG],
+        #     'level': 'DEBUG',
+        # },
+        # Python Social Auth logging
+        # 'social': {
+        #     'handlers': [DEFAULT_LOG],
+        #     'level': 'DEBUG',
+        # },
+    }
+}
+
+# Logging of management commands to console
+if (os.environ.get('DJANGO_IS_MANAGEMENT_COMMAND', False) and
+        'console' not in LOGGING['loggers']['weblate']['handlers']):
+    LOGGING['loggers']['weblate']['handlers'].append('console')
+
+# Remove syslog setup if it's not present
+if not HAVE_SYSLOG:
+    del LOGGING['handlers']['syslog']
+
+# List of machine translations
+# MACHINE_TRANSLATION_SERVICES = (
+#     'weblate.trans.machine.apertium.ApertiumAPYTranslation',
+#     'weblate.trans.machine.glosbe.GlosbeTranslation',
+#     'weblate.trans.machine.google.GoogleTranslation',
+#     'weblate.trans.machine.microsoft.MicrosoftCognitiveTranslation',
+#     'weblate.trans.machine.mymemory.MyMemoryTranslation',
+#     'weblate.trans.machine.tmserver.AmagamaTranslation',
+#     'weblate.trans.machine.tmserver.TMServerTranslation',
+#     'weblate.trans.machine.yandex.YandexTranslation',
+#     'weblate.trans.machine.weblatetm.WeblateSimilarTranslation',
+#     'weblate.trans.machine.weblatetm.WeblateTranslation',
+# )
+
+# Machine translation API keys
+
+# URL of the Apertium APy server
+MT_APERTIUM_APY = None
+
+# Microsoft Translator service, register at
+# https://datamarket.azure.com/developer/applications/
+MT_MICROSOFT_ID = None
+MT_MICROSOFT_SECRET = None
+
+# Microsoft Cognitive Services Translator API, register at
+# https://portal.azure.com/
+MT_MICROSOFT_COGNITIVE_KEY = None
+
+# MyMemory identification email, see
+# https://mymemory.translated.net/doc/spec.php
+MT_MYMEMORY_EMAIL = None
+
+# Optional MyMemory credentials to access private translation memory
+MT_MYMEMORY_USER = None
+MT_MYMEMORY_KEY = None
+
+# Google API key for Google Translate API
+MT_GOOGLE_KEY = None
+
+# API key for Yandex Translate API
+MT_YANDEX_KEY = None
+
+# tmserver URL
+MT_TMSERVER = None
+
+# Title of site to use
+SITE_TITLE = 'Weblate'
+
+# Whether site uses https
+ENABLE_HTTPS = True
+
+# Use HTTPS when creating redirect URLs for social authentication, see
+# documentation for more details:
+# http://python-social-auth-docs.readthedocs.io/en/latest/configuration/settings.html#processing-redirects-and-urlopen
+SOCIAL_AUTH_REDIRECT_IS_HTTPS = ENABLE_HTTPS
+
+# Make CSRF cookie HttpOnly, see documentation for more details:
+# https://docs.djangoproject.com/en/1.11/ref/settings/#csrf-cookie-httponly
+CSRF_COOKIE_HTTPONLY = True
+CSRF_COOKIE_SECURE = ENABLE_HTTPS
+# Store CSRF token in session (since Django 1.11)
+CSRF_USE_SESSIONS = True
+SESSION_COOKIE_SECURE = ENABLE_HTTPS
+# Session cookie age (in seconds)
+SESSION_COOKIE_AGE = 1209600
+
+# URL of login
+LOGIN_URL = '{0}/accounts/login/'.format(URL_PREFIX)
+
+# URL of logout
+LOGOUT_URL = '{0}/accounts/logout/'.format(URL_PREFIX)
+
+# Default location for login
+LOGIN_REDIRECT_URL = '{0}/'.format(URL_PREFIX)
+
+# Anonymous user name
+ANONYMOUS_USER_NAME = 'anonymous'
+
+# Reverse proxy settings
+IP_BEHIND_REVERSE_PROXY = False
+IP_PROXY_HEADER = 'HTTP_X_FORWARDED_FOR'
+IP_PROXY_OFFSET = 0
+
+# Sending HTML in mails
+EMAIL_SEND_HTML = True
+
+# Subject of emails includes site title
+EMAIL_SUBJECT_PREFIX = '[{0}] '.format(SITE_TITLE)
+
+# Enable remote hooks
+ENABLE_HOOKS = True
+
+# Whether to run hooks in background
+BACKGROUND_HOOKS = True
+
+# Number of nearby messages to show in each direction
+NEARBY_MESSAGES = 5
+
+# Enable lazy commits
+LAZY_COMMITS = True
+
+# Offload indexing
+OFFLOAD_INDEXING = True
+
+# Use simple language codes for default language/country combinations
+SIMPLIFY_LANGUAGES = True
+
+# Render forms using bootstrap
+CRISPY_TEMPLATE_PACK = 'bootstrap3'
+
+# List of quality checks
+# CHECK_LIST = (
+#     'weblate.trans.checks.same.SameCheck',
+#     'weblate.trans.checks.chars.BeginNewlineCheck',
+#     'weblate.trans.checks.chars.EndNewlineCheck',
+#     'weblate.trans.checks.chars.BeginSpaceCheck',
+#     'weblate.trans.checks.chars.EndSpaceCheck',
+#     'weblate.trans.checks.chars.EndStopCheck',
+#     'weblate.trans.checks.chars.EndColonCheck',
+#     'weblate.trans.checks.chars.EndQuestionCheck',
+#     'weblate.trans.checks.chars.EndExclamationCheck',
+#     'weblate.trans.checks.chars.EndEllipsisCheck',
+#     'weblate.trans.checks.chars.EndSemicolonCheck',
+#     'weblate.trans.checks.chars.MaxLengthCheck',
+#     'weblate.trans.checks.format.PythonFormatCheck',
+#     'weblate.trans.checks.format.PythonBraceFormatCheck',
+#     'weblate.trans.checks.format.PHPFormatCheck',
+#     'weblate.trans.checks.format.CFormatCheck',
+#     'weblate.trans.checks.format.PerlFormatCheck',
+#     'weblate.trans.checks.format.JavascriptFormatCheck',
+#     'weblate.trans.checks.consistency.PluralsCheck',
+#     'weblate.trans.checks.consistency.SamePluralsCheck',
+#     'weblate.trans.checks.consistency.ConsistencyCheck',
+#     'weblate.trans.checks.consistency.TranslatedCheck',
+#     'weblate.trans.checks.chars.NewlineCountingCheck',
+#     'weblate.trans.checks.markup.BBCodeCheck',
+#     'weblate.trans.checks.chars.ZeroWidthSpaceCheck',
+#     'weblate.trans.checks.markup.XMLValidityCheck',
+#     'weblate.trans.checks.markup.XMLTagsCheck',
+#     'weblate.trans.checks.source.OptionalPluralCheck',
+#     'weblate.trans.checks.source.EllipsisCheck',
+#     'weblate.trans.checks.source.MultipleFailingCheck',
+# )
+
+# List of automatic fixups
+# AUTOFIX_LIST = (
+#     'weblate.trans.autofixes.whitespace.SameBookendingWhitespace',
+#     'weblate.trans.autofixes.chars.ReplaceTrailingDotsWithEllipsis',
+#     'weblate.trans.autofixes.chars.RemoveZeroSpace',
+#     'weblate.trans.autofixes.chars.RemoveControlChars',
+# )
+
+# List of scripts to use in custom processing
+# POST_UPDATE_SCRIPTS = (
+# )
+# PRE_COMMIT_SCRIPTS = (
+# )
+
+# E-mail address that error messages come from.
+SERVER_EMAIL = 'noreply@__DOMAIN__'
+
+# Default email address to use for various automated correspondence from
+# the site managers. Used for registration emails.
+DEFAULT_FROM_EMAIL = '__ADMINMAIL__'
+
+# List of URLs your site is supposed to serve
+ALLOWED_HOSTS = ['__DOMAIN__']
+
+# Example configuration to use memcached for caching
+CACHES = {
+    'default': {
+        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+        'LOCATION': '127.0.0.1:__MEMCPORT__',
+    },
+    'avatar': {
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': os.path.join(BASE_DIR, 'avatar-cache'),
+        'TIMEOUT': 3600,
+        'OPTIONS': {
+            'MAX_ENTRIES': 1000,
+        },
+    }
+}
+
+# REST framework settings for API
+REST_FRAMEWORK = {
+    # Use Django's standard `django.contrib.auth` permissions,
+    # or allow read-only access for unauthenticated users.
+    'DEFAULT_PERMISSION_CLASSES': [
+        'rest_framework.permissions.IsAuthenticatedOrReadOnly'
+    ],
+    'DEFAULT_AUTHENTICATION_CLASSES': (
+        'rest_framework.authentication.TokenAuthentication',
+        'rest_framework.authentication.SessionAuthentication',
+    ),
+    'DEFAULT_THROTTLE_CLASSES': (
+        'rest_framework.throttling.AnonRateThrottle',
+        'rest_framework.throttling.UserRateThrottle'
+    ),
+    'DEFAULT_THROTTLE_RATES': {
+        'anon': '100/day',
+        'user': '1000/day'
+    },
+    'DEFAULT_PAGINATION_CLASS': (
+        'rest_framework.pagination.PageNumberPagination'
+    ),
+    'PAGE_SIZE': 20,
+    'VIEW_DESCRIPTION_FUNCTION': 'weblate.api.views.get_view_description',
+    'UNAUTHENTICATED_USER': 'weblate.accounts.models.get_anonymous',
+}
+
+# Example for restricting access to logged in users
+# LOGIN_REQUIRED_URLS = (
+#     r'/(.*)$',
+# )
+
+# In such case you will want to include some of the exceptions
+# LOGIN_REQUIRED_URLS_EXCEPTIONS = (
+#    r'/accounts/(.*)$', # Required for login
+#    r'/static/(.*)$',   # Required for development mode
+#    r'/widgets/(.*)$',  # Allowing public access to widgets
+#    r'/data/(.*)$',     # Allowing public access to data exports
+#    r'/hooks/(.*)$',    # Allowing public access to notification hooks
+#    r'/api/(.*)$',      # Allowing access to API
+# )
+
+# Force sane test runner
+TEST_RUNNER = 'django.test.runner.DiscoverRunner'
diff --git a/manifest.json b/manifest.json
index 1b67591..47fcfbb 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,12 +3,12 @@
 	"id": "weblate",
 	"packaging_format": 1,
 	"requirements": {
-		"yunohost": ">= 2.7.0"
+		"yunohost": ">= 2.7.10"
 	},
 	"description": {
 		"en": "A translation platform using Git and Python"
 	},
-	"version": "2.18-1",
+	"version": "2.20-1",
 	"url": "https://weblate.org",
 	"license": "AGPL-3.0",
 	"maintainer": {
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 77f027c..b92c20a 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-current_version="2.18"
+current_version="2.20"
 
 ynh_check_global_uwsgi_config () {
 	uwsgi --version || ynh_die "You need to add uwsgi (and appropriate plugin) as a dependency"
diff --git a/scripts/_future.sh b/scripts/_future.sh
deleted file mode 100644
index d603e2d..0000000
--- a/scripts/_future.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/bin/bash
-
-# source: https://github.com/YunoHost/yunohost/commit/4f62eb5320323d4f4de83b2af306ae53e89bc5ba
-# Define and install dependencies with a equivs control file
-# This helper can/should only be called once per app
-#
-# usage: ynh_install_app_dependencies dep [dep [...]]
-# | arg: dep - the package name to install in dependence
-ynh_install_app_dependencies () {
-    dependencies=$@
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version=$(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
-    dep_app=${app//_/-}	# Replace all '_' by '-'
-
-    cat > /tmp/${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
-Section: misc
-Priority: optional
-Package: ${dep_app}-ynh-deps
-Version: ${version}
-Depends: ${dependencies// /, }
-Architecture: all
-Description: Fake package for ${app} (YunoHost app) dependencies
- This meta-package is only responsible of installing its dependencies.
-EOF
-    ynh_package_install_from_equivs /tmp/${dep_app}-ynh-deps.control \
-        || ynh_die "Unable to install dependencies"	# Install the fake package and its dependencies
-    rm /tmp/${dep_app}-ynh-deps.control
-    ynh_app_setting_set $app apt_dependencies $dependencies
-}
diff --git a/scripts/backup b/scripts/backup
index 04a961c..1acc508 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -14,7 +14,6 @@ fi
 
 source _common.sh
 source /usr/share/yunohost/helpers
-source _future.sh
 
 ynh_abort_if_errors
 
diff --git a/scripts/change_url b/scripts/change_url
index cd43236..9ba67e8 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -8,7 +8,6 @@
 set -eu
 source _common.sh
 source /usr/share/yunohost/helpers
-source _future.sh
 
 #=================================================
 # RETRIEVE ARGUMENTS
diff --git a/scripts/install b/scripts/install
index a115406..f5692c1 100755
--- a/scripts/install
+++ b/scripts/install
@@ -8,7 +8,6 @@
 set -eu
 source _common.sh
 source /usr/share/yunohost/helpers
-source _future.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -185,8 +184,10 @@ virtualenv --python=python3 "${final_path}/venv"
 	source "${final_path}/venv/bin/activate"
 	set -o nounset
 	pip install --upgrade pip
+	# prevent error: "command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers"
+	pip install --upgrade setuptools
 	pip install Weblate=="$current_version"
-	pip install python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached phply
+	pip install pytz python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached phply
 	# specific to YunoHost package:
 	pip install django_sendmail_backend
 )
diff --git a/scripts/remove b/scripts/remove
index 2739c8a..a8452b3 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -8,7 +8,6 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
-source _future.sh
 
 #=================================================
 # LOAD SETTINGS
diff --git a/scripts/restore b/scripts/restore
index c43630c..eded65e 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -12,12 +12,6 @@ if [ ! -e _common.sh ]; then
 	chmod a+rx _common.sh
 fi
 
-if [ ! -e _future.sh ]; then
-	# Get the _common.sh file if it's not in the current directory
-	cp ../settings/scripts/_future.sh ./_future.sh
-	chmod a+rx _future.sh
-fi
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
@@ -81,7 +75,7 @@ chown -R "$app": "$final_path"
 #=================================================
 
 ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
-	libjpeg-dev libz-dev libyaml-dev python3-dev python3-pip python3-virtualenv \
+	libjpeg-dev libz-dev libyaml-dev python3-dev python3-pip python3-virtualenv python-virtualenv \
 	postgresql libpq-dev uwsgi uwsgi-plugin-python3 memcached
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index b28eb03..9dce434 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -7,7 +7,6 @@
 #=================================================
 source _common.sh
 source /usr/share/yunohost/helpers
-source _future.sh
 
 ynh_abort_if_errors
 
@@ -184,8 +183,12 @@ settings_diff="$final_path/settings.${previous_version}_${current_version}.diff"
 	source "${final_path}/venv/bin/activate"
 	set -o nounset
 	pip install --upgrade pip
+	# prevent error: "command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers"
+	pip install --upgrade setuptools
 	pip install Weblate=="$current_version"
-	pip install python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached phply
+	# prevent error "ImportError: No module named 'social'"
+	pip install -r "$final_path/venv/lib/python3.4/site-packages/weblate/requirements.txt"
+	pip install pytz python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached phply
 	# specific to YunoHost package:
 	pip install django_sendmail_backend
 )
@@ -246,6 +249,23 @@ fi
 	weblate collectstatic --noinput
 	weblate setuplang
 	weblate setupgroups
+
+	if [[ $previous_version = "2.16" ]] || \
+		[[ $previous_version = "2.17.1" ]] || \
+		[[ $previous_version = "2.18"   ]]
+	then
+		weblate loadpo --all --lang dsb
+		weblate loadpo --all --lang he
+		weblate loadpo --all --lang hsb
+		weblate loadpo --all --lang kw
+		weblate loadpo --all --lang lt
+		weblate loadpo --all --lang lv
+	fi
+
+	if [[ "$migrate_py2to3" = true ]]
+	then
+		weblate rebuild_index --clean --all
+	fi
 )
 
 # Recalculate and store the config file checksum into the app settings