diff --git a/.ci/run-safety.sh b/.ci/run-safety.sh
new file mode 100644
index 0000000000000000000000000000000000000000..8e4332e6a01bf7a62b9a261449e1fb4acce4ea9b
--- /dev/null
+++ b/.ci/run-safety.sh
@@ -0,0 +1,6 @@
+#! /bin/bash
+# 38678: django-celery-results: no update currently available
+# https://github.com/celery/django-celery-results/issues/154
+poetry run safety check \
+        -i 38678 \
+        --full-report
diff --git a/.ci/run-tests-for-ci.sh b/.ci/run-tests-for-ci.sh
index d86b759245ff38cb4153fc4fd93d2de0ba29dd50..9e18f0524dafb03e2ab14c1fa5f709eb72867d80 100644
--- a/.ci/run-tests-for-ci.sh
+++ b/.ci/run-tests-for-ci.sh
@@ -15,23 +15,27 @@ echo "i18n"
 cp local_settings_example.py local_settings.py
 
 # Make sure i18n literals marked correctly
-poetry run python manage.py makemessages --no-location --ignore=req.txt > output.txt
-
-if [[ -n $(grep "msgid" output.txt) ]]; then
-    echo "Command 'python manage.py makemessages' failed with the following info:"
-    echo ""
-    grep --color -E '^|warning: ' output.txt
-    exit 1;
-fi
-
+poetry run python manage.py makemessages
 poetry run python manage.py compilemessages
 
 echo "Starts testing"
 export RELATE_LOCAL_TEST_SETTINGS="local_settings_example.py"
 
+PYTEST_COMMON_FLAGS=(--cov-config=setup.cfg --cov-report=xml --cov=. --tb=native)
+
+if test "$CI_SERVER_NAME" = "GitLab"; then
+        # I don't *really* know what's going on, but I observed EADDRNOTAVAIL
+        # when the tests try to connect to the code grading process.
+        #
+        # Sample failed job:
+        # https://gitlab.tiker.net/inducer/relate/-/jobs/159522
+        # -AK, 2020-09-01
+        PYTEST_COMMON_FLAGS+=(-k "not LanguageOverrideTest")
+fi
+
 if [[ "$RL_CI_TEST" = "expensive" ]]; then
     echo "Expensive tests"
-    poetry run pytest --slow --cov-config=setup.cfg --cov-report=xml --cov=.
+    poetry run python -m pytest "${PYTEST_COMMON_FLAGS[@]}" --slow
 elif [[ "$RL_CI_TEST" = "postgres" ]]; then
     export PGPASSWORD=relatepgpass
 
@@ -52,8 +56,8 @@ elif [[ "$RL_CI_TEST" = "postgres" ]]; then
 
     poetry run pip install psycopg2
     echo "Database tests"
-    poetry run pytest --cov-config=setup.cfg --cov-report=xml --cov=.
+    poetry run python -m pytest "${PYTEST_COMMON_FLAGS[@]}"
 else
     echo "Base tests"
-    poetry run pytest --cov-config=setup.cfg --cov-report=xml --cov=.
+    poetry run python -m pytest "${PYTEST_COMMON_FLAGS[@]}"
 fi
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d669091f79d35a416be1116dbc213623ab725b56..d5871a132d789c5828b0de1ad95d09248f01c8f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,14 +13,11 @@ jobs:
   lint:
     name: Lint and typecheck
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: [3.6, 3.7, 3.8]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: '3.x'
       - name: Install Poetry
         uses: dschep/install-poetry-action@v1.3
         with:
@@ -41,7 +38,11 @@ jobs:
       - name: "Mypy"
         run: poetry run mypy relate course
       - name: "Safety"
-        run: poetry run safety check ${safety_ignores} --full-report
+        run: bash ./.ci/run-safety.sh
+      - name: "Sphinx"
+        run: |
+            cp local_settings_example.py local_settings.py
+            (cd doc; poetry run make html SPHINXOPTS="-W --keep-going -n")
 
 
   pytest:
@@ -107,7 +108,7 @@ jobs:
           poetry run relate validate .
           poetry run relate test-code questions/autograded-python-example.yml
           poetry run relate expand-yaml flows/quiz-test.yml > /dev/null
-  
+
   # pytest-windows:
   #   name: Python - Windows
   #   runs-on: windows-latest
@@ -141,6 +142,6 @@ jobs:
   #       uses: codecov/codecov-action@v1
   #       with:
   #         fail_ci_if_error: true
-      
+
 
 # vim: sw=2
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a77d721007cf57bbba11666e9dff339cb642458e..daa2241ec97f597a764c7cf6bc17b950433a5495 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,12 +21,12 @@ stages:
   - docs
 
 .install-deps-template: &install-deps
-  image: python:3.7
+  image: inducer/ci-base-image
   tags:
     - docker-runner
   before_script:
-    - export PATH="/var/lib/gitlab-runner/.local/bin:$PATH"
-    - pip3 install --upgrade poetry
+    - curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python3
+    - export PATH="$HOME/.poetry/bin:$PATH"
     - poetry install
 
 .quality-template: &quality
@@ -37,13 +37,9 @@ stages:
 
 .test-template: &test
   <<: *install-deps
-  image: python:3.7
   script:
     - "bash ./.ci/run-tests-for-ci.sh"
   stage: tests
-  tags:
-    - python3
-    - linux
   except:
     - tags
   coverage: "/TOTAL.+ ([0-9]{1,3}%)/"
@@ -63,13 +59,19 @@ mypy:
   <<: *quality
   script: poetry run mypy relate course
 
+safety:
+  <<: *quality
+  script: bash ./.ci/run-safety.sh
+
 Python 3:
   <<: *test
+  needs: [setup]
 
 Python 3 Expensive:
   <<: *test
   variables:
     RL_CI_TEST: expensive
+  needs: [setup]
 
 Python 3 CLI Tool:
   <<: *test
@@ -79,6 +81,7 @@ Python 3 CLI Tool:
     - poetry run relate validate .
     - poetry run relate test-code questions/autograded-python-example.yml
     - poetry run relate expand-yaml flows/quiz-test.yml > /dev/null
+  needs: [setup]
 
 Documentation:
   <<: *install-deps
@@ -87,7 +90,4 @@ Documentation:
     RELATE_LOCAL_TEST_SETTINGS: './local_settings_example.py'
   script:
     - poetry run bash ./doc/build-docs.sh
-  tags:
-    - python3
-  only:
-    - master
+  needs: [setup]
diff --git a/course/page/base.py b/course/page/base.py
index 2e3edc9a1e72bc8f85cada856448554626a082a5..3f320f5a1f47489518a88b96d0b1ae585fc2bb53 100644
--- a/course/page/base.py
+++ b/course/page/base.py
@@ -25,6 +25,7 @@ THE SOFTWARE.
 """
 
 import django.forms as forms
+from django import http
 
 from course.validation import validate_struct, ValidationError
 from course.constants import MAX_EXTRA_CREDIT_FACTOR
@@ -40,18 +41,50 @@ from django.conf import settings
 
 # {{{ mypy
 
-from typing import Text, Optional, Any, Tuple, Dict, Callable, FrozenSet, Union, TYPE_CHECKING  # noqa
+from typing import (Text, Optional, Any, Tuple, Dict, Callable, FrozenSet, Union,
+        TYPE_CHECKING)
+
 if TYPE_CHECKING:
-    from django import http  # noqa
+    # FIXME There seem to be some cyclic imports that prevent importing these
+    # outright.
     from course.models import (  # noqa
             Course,
             FlowSession
             )
-    from course.content import Repo_ish  # noqa
+    from relate.utils import Repo_ish
 
 # }}}
 
 
+__doc__ = """
+Stub Docs of Internals
+======================
+
+.. class:: Repo_ish
+
+    See ``relate.utils.Repo_ish``.
+
+.. class:: Course
+
+    See ``course.models.Course``.
+
+.. class:: FlowSession
+
+    See ``course.models.FlowSession``.
+
+Page Interface
+==============
+
+.. autoclass:: PageContext
+.. autoclass:: PageBehavior
+
+.. autoclass:: AnswerFeedback
+
+.. exception:: InvalidPageData
+
+.. autoclass:: PageBase
+"""
+
 mark_safe_lazy = lazy(mark_safe, str)
 
 
@@ -72,12 +105,12 @@ class PageContext(object):
 
     def __init__(
             self,
-            course,  # type: Course
-            repo,  # type: Repo_ish
-            commit_sha,  # type: bytes
-            flow_session,  # type: FlowSession
-            in_sandbox=False,  # type: bool
-            page_uri=None,  # type: Optional[str]
+            course: "Course",
+            repo: "Repo_ish",
+            commit_sha: bytes,
+            flow_session: "FlowSession",
+            in_sandbox: bool = False,
+            page_uri: Optional[str] = None,
             ):
         # type: (...) -> None
 
@@ -508,12 +541,11 @@ class PageBase(object):
 
     def answer_data(
             self,
-            page_context,  # type:  PageContext
-            page_data,  # type: Any
-            form,  # type: forms.Form
-            files_data,  # type: Any
-            ):
-        # type: (...) -> Any
+            page_context: PageContext,
+            page_data: Any,
+            form: forms.Form,
+            files_data: Any,
+            ) -> Any:
         """Return a JSON-persistable object reflecting the user's answer on the
         form. This will be passed to methods below as *answer_data*.
         """
@@ -540,12 +572,11 @@ class PageBase(object):
 
     def post_form(
             self,
-            page_context,  # type: PageContext
-            page_data,  # type: Any
-            post_data,  # type: Any
-            files_data  # type: Any
-            ):
-        # type: (...) -> forms.Form
+            page_context: PageContext,
+            page_data: Any,
+            post_data: Any,
+            files_data: Any,
+            ) -> forms.Form:
         raise NotImplementedError()
 
     def process_form_post(
@@ -555,8 +586,7 @@ class PageBase(object):
             post_data,  # type: Any
             files_data,  # type: Any
             page_behavior,  # type: PageBehavior
-            ):
-        # type: (...) -> forms.Form
+            ) -> forms.Form:
         """Return a form with the POST response from *post_data* and *files_data*
         filled in.
 
@@ -596,11 +626,10 @@ class PageBase(object):
 
     def make_grading_form(
             self,
-            page_context,  # type: PageContext
-            page_data,  # type: Any
-            grade_data  # type: Any
-            ):
-        # type: (...) -> forms.Form
+            page_context: PageContext,
+            page_data: Any,
+            grade_data: Any,
+            ) -> forms.Form:
         """
         :arg grade_data: value returned by
             :meth:`update_grade_data_from_grading_form_v2`.  May be *None*.
@@ -611,13 +640,12 @@ class PageBase(object):
 
     def post_grading_form(
             self,
-            page_context,  # type: PageContext
-            page_data,  # type: Any
-            grade_data,  # type: Any
-            post_data,  # type: Any
-            files_data  # type: Any
-            ):
-        # type: (...) -> forms.Form
+            page_context: PageContext,
+            page_data: Any,
+            grade_data: Any,
+            post_data: Any,
+            files_data: Any,
+            ) -> forms.Form:
         """Return a form with the POST response from *post_data* and *files_data*
         filled in.
 
diff --git a/course/page/upload.py b/course/page/upload.py
index 2c5024fa098e67fc4a1f847887a7a0e8be718632..a3347275608764813c037d7d2add8a8c7986b038 100644
--- a/course/page/upload.py
+++ b/course/page/upload.py
@@ -143,12 +143,6 @@ class FileUploadQuestion(PageBaseWithTitle, PageBaseWithValue,
         Content that is revealed when answers are visible
         (see :ref:`flow-permissions`). Written in :ref:`markup`.
 
-    .. attribute:: correct_answer
-
-        Optional.
-        Content that is revealed when answers are visible
-        (see :ref:`flow-permissions`). Written in :ref:`markup`.
-
     .. attribute:: rubric
 
         Required.
diff --git a/course/validation.py b/course/validation.py
index f00ddd237ef029284e4342d47112be6eadccd948..39d135c2a9841bec229bcde20c6101155b321b64 100644
--- a/course/validation.py
+++ b/course/validation.py
@@ -50,6 +50,19 @@ if TYPE_CHECKING:
 # }}}
 
 
+__doc__ = """
+.. autoclass:: ValidationContext
+
+.. autofunction:: validate_struct
+
+Stub Docs
+=========
+
+.. class:: Course
+.. class:: Repo_ish
+"""
+
+
 # {{{ validation tools
 
 class ValidationError(RuntimeError):
diff --git a/doc/Makefile b/doc/Makefile
index 54ca9573e0e5ede999519825508e1801f7e529fb..eee17b1c56bc152192312a8172f5043c11be03e1 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -3,15 +3,10 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    =
-SPHINXBUILD   = python `which sphinx-build`
+SPHINXBUILD   = python -m sphinx
 PAPER         =
 BUILDDIR      = _build
 
-# User-friendly check for sphinx-build
-ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
-$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
-endif
-
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
diff --git a/doc/build-docs.sh b/doc/build-docs.sh
index af825a0606e56ed94321d580272f2be22866031e..ef850223cb9ef1ff4fb90de3217ccf34c1d81dd2 100644
--- a/doc/build-docs.sh
+++ b/doc/build-docs.sh
@@ -20,9 +20,9 @@ Host doc-upload
    StrictHostKeyChecking false
 END
 
-make html
+make html SPHINXOPTS="-W --keep-going -n"
 
-if test -n "${DOC_UPLOAD_KEY}"; then
+if test -n "${DOC_UPLOAD_KEY}" && test "$CI_COMMIT_REF_NAME" = "master"; then
   echo "${DOC_UPLOAD_KEY}" > doc_upload_key
   chmod 0600 doc_upload_key
   RSYNC_RSH="ssh -F doc_upload_ssh_config" ./upload-docs.sh || { rm doc_upload_key; exit 1; }
diff --git a/doc/conf.py b/doc/conf.py
index e1be25a3be4bef11cba7e8318b8b17aa8f32358b..58bbc9faacee2d498c8aeb83cbd868c9b9b67aa0 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -35,9 +35,21 @@ django.setup()
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.intersphinx",
 ]
 
+autodoc_typehints = "none"
+
+intersphinx_mapping = {
+        "http://docs.python.org/dev": None,
+        "http://docs.scipy.org/doc/numpy/": None,
+        "django": ("http://docs.djangoproject.com/en/dev/",
+            "http://docs.djangoproject.com/en/dev/_objects/"),
+        "https://docs.sympy.org/latest": None,
+        "https://www.dulwich.io/docs/": None,
+        }
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -150,7 +162,7 @@ html_sidebars = {
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+#html_static_path = ['_static']
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied
diff --git a/doc/content.rst b/doc/content.rst
index da0f303cb3580779b7b7d86ae865f176d29608d8..d69980626e2dbc5d88f6c6533746f3b9d673d7f9 100644
--- a/doc/content.rst
+++ b/doc/content.rst
@@ -113,7 +113,7 @@ literals::
 :ref:`markup` does its own Jinja expansion though, so such block literals
 *can* use Jinja.
 
-.. comment::
+.. ::
 
     (Let's keep this undocumented for now.)
 
@@ -338,7 +338,7 @@ RELATE provides the functionality of rendering `Ipython Notebooks
 .. function:: render_notebook_cells(ipynb_path, indices=None, clear_output=False,
                                   clear_markdown=False)
 
-    :param ipynb_path: :class:`string`, the path of the ipython notebook in
+    :param ipynb_path: :class:`str`, the path of the ipython notebook in
         the repo.
     :param indices: :class:`list`, the indices of cells which are expected to
         be rendered. For example, ``[1, 2, 3, 6]`` or ``range(3, -1)``. If not
@@ -347,7 +347,7 @@ RELATE provides the functionality of rendering `Ipython Notebooks
         output of code cells should be removed. Default: `False`.
     :param clear_markdown: :class:`bool`, indicating whether all text cells
         will be removed. Default: `False`.
-    :rtype: :class:`string`, rendered markdown which will be consequently
+    :rtype: :class:`str`, rendered markdown which will be consequently
      converted to HTML.
 
 For example, the following snippet shows the HTML version of ``test.ipynb`` in repo
diff --git a/doc/flow.rst b/doc/flow.rst
index dd31cf0c058eec53e2bc123d618027728497784e..bfad1a15323abcc0012fd3736ae849cbdcdf4671 100644
--- a/doc/flow.rst
+++ b/doc/flow.rst
@@ -615,14 +615,14 @@ Each group allows the following attributes:
     .. attribute:: shuffle
 
         (Optional) A boolean (True/False) indicating whether the order
-        of pages should be as in the list :attr:`FlowGroup.pages` or
+        of pages should be as in the list :attr:`pages` or
         determined by random shuffling
 
     .. attribute:: max_page_count
 
         (Optional) An integer limiting the page count of this group
         to a certain value. Allows selection of a random subset by combining
-        with :attr:`FlowGroup.shuffle`.
+        with :attr:`shuffle`.
 
 .. _page-permissions:
 
@@ -708,12 +708,13 @@ The following page types are predefined:
 .. |is-optional-page-attr| replace::
 
     Optional. A Boolean value indicating whether the page is an optional page
-    which does not require answer for full completion of the flow.
-    If ``true``, :attr:`value` should not present. Defaults to ``false`` if not present.
-    Note that ``is_optional_page: true`` differs from ``value: 0`` in that finishing flows
-    with unanswered page(s) with the latter will be warned of "unanswered question(s)",
-    while with the former won't. When using not-for-grading page(s) to collect
-    answers from students, it's to better use ``value: 0``.
+    which does not require answer for full completion of the flow.  If
+    ``true``, the attribute *value* should not present. Defaults to ``false``
+    if not present.  Note that ``is_optional_page: true`` differs from ``value:
+    0`` in that finishing flows with unanswered page(s) with the latter will be
+    warned of "unanswered question(s)", while with the former won't. When using
+    not-for-grading page(s) to collect answers from students, it's to better
+    use ``value: 0``.
 
 .. |text-widget-page-attr| replace::
 
diff --git a/doc/grading.rst b/doc/grading.rst
deleted file mode 100644
index 35a34e7efb3eaff714a9159d67d208dca4cd69b4..0000000000000000000000000000000000000000
--- a/doc/grading.rst
+++ /dev/null
@@ -1,3 +0,0 @@
-Grading
-=======
-
diff --git a/doc/index.rst b/doc/index.rst
index e8fd262cf76e721a46247b0396a5dba3d42dde3d..fdac0e6c8197e8792e86402a6fb73eb25ff16386 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -62,11 +62,12 @@ Table of Contents
 .. toctree::
     :maxdepth: 3
 
-    content.rst
-    flow.rst
-    api.rst
-    faq.rst
-    misc.rst
+    content
+    flow
+    page
+    api
+    faq
+    misc
 
 * :ref:`genindex`
 
diff --git a/doc/page.rst b/doc/page.rst
new file mode 100644
index 0000000000000000000000000000000000000000..a5070d363bf4d686a89b11a851dd6b741cff861a
--- /dev/null
+++ b/doc/page.rst
@@ -0,0 +1,42 @@
+Flow Page Interface
+===================
+
+This describes the programming interface between Relate and a page in a flow.
+
+.. automodule:: course.page.base
+
+Validation
+----------
+
+.. automodule:: course.validation
+
+Canonicalization of Django Names
+================================
+
+.. currentmodule:: django.forms.forms
+
+.. class:: Form
+
+    See :class:`django.forms.Form`.
+
+.. currentmodule:: django.http.request
+
+.. class:: HttpRequest
+
+    See :class:`django.http.HttpRequest`.
+
+Stub Docs
+=========
+
+.. currentmodule:: course.models
+
+.. class:: Course
+.. class:: FlowSession
+
+.. currentmodule:: relate.utils
+
+.. class:: SubdirRepoWrapper
+
+.. currentmodule:: course.utils
+
+.. class:: FlowPageContext
diff --git a/poetry.lock b/poetry.lock
index 79c3de304067c32d38715a0755b4e34c3ad53036..4802f96b254b722e238e6b19a8b3ece396fa2b2c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,3 +1,11 @@
+[[package]]
+category = "dev"
+description = "A configurable sidebar-enabled Sphinx theme"
+name = "alabaster"
+optional = false
+python-versions = "*"
+version = "0.7.12"
+
 [[package]]
 category = "main"
 description = "Low-level AMQP client for Python (fork of amqplib)."
@@ -52,13 +60,23 @@ description = "Classes Without Boilerplate"
 name = "attrs"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
+version = "20.1.0"
 
 [package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+dev = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "sphinx-rtd-theme", "pre-commit"]
+docs = ["sphinx", "sphinx-rtd-theme", "zope.interface"]
+tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+
+[[package]]
+category = "dev"
+description = "Internationalization utilities"
+name = "babel"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.8.0"
+
+[package.dependencies]
+pytz = ">=2015.7"
 
 [[package]]
 category = "main"
@@ -73,8 +91,8 @@ category = "main"
 description = "Modern password hashing for your software and your servers"
 name = "bcrypt"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.1.7"
+python-versions = ">=3.6"
+version = "3.2.0"
 
 [package.dependencies]
 cffi = ">=1.1"
@@ -82,6 +100,7 @@ six = ">=1.4.1"
 
 [package.extras]
 tests = ["pytest (>=3.2.1,<3.3.0 || >3.3.0)"]
+typecheck = ["mypy"]
 
 [[package]]
 category = "main"
@@ -166,7 +185,7 @@ description = "Foreign Function Interface for Python calling C code."
 name = "cffi"
 optional = false
 python-versions = "*"
-version = "1.14.1"
+version = "1.14.2"
 
 [package.dependencies]
 pycparser = "*"
@@ -193,7 +212,7 @@ description = "Hosted coverage reports for GitHub, Bitbucket and Gitlab"
 name = "codecov"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.1.8"
+version = "2.1.9"
 
 [package.dependencies]
 coverage = "*"
@@ -224,7 +243,7 @@ description = "cryptography is a package which provides cryptographic recipes an
 name = "cryptography"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-version = "3.0"
+version = "3.1"
 
 [package.dependencies]
 cffi = ">=1.8,<1.11.3 || >1.11.3"
@@ -233,7 +252,6 @@ six = ">=1.4.1"
 [package.extras]
 docs = ["sphinx (>=1.6.5,<1.8.0 || >1.8.0,<3.1.0 || >3.1.0,<3.1.1 || >3.1.1)", "sphinx-rtd-theme"]
 docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
-idna = ["idna (>=2.1)"]
 pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
 ssh = ["bcrypt (>=3.1.5)"]
 test = ["pytest (>=3.6.0,<3.9.0 || >3.9.0,<3.9.1 || >3.9.1,<3.9.2 || >3.9.2)", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,<3.79.2 || >3.79.2)"]
@@ -260,7 +278,7 @@ description = "A high-level Python Web framework that encourages rapid developme
 name = "django"
 optional = false
 python-versions = ">=3.6"
-version = "3.0.8"
+version = "3.0.10"
 
 [package.dependencies]
 asgiref = ">=3.2,<4.0"
@@ -296,10 +314,10 @@ description = "Celery result backends for Django."
 name = "django-celery-results"
 optional = false
 python-versions = "*"
-version = "1.0.1"
+version = "1.2.1"
 
 [package.dependencies]
-celery = ">=4.0,<5.0"
+celery = ">=4.4,<5.0"
 
 [[package]]
 category = "main"
@@ -409,6 +427,14 @@ version = "0.4.0"
 [package.dependencies]
 six = ">=1.4.0"
 
+[[package]]
+category = "dev"
+description = "Docutils -- Python Documentation Utilities"
+name = "docutils"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.16"
+
 [[package]]
 category = "dev"
 description = "A parser for Python dependency files"
@@ -431,7 +457,7 @@ description = "Python Git Library"
 name = "dulwich"
 optional = false
 python-versions = ">=3.5"
-version = "0.20.5"
+version = "0.20.6"
 
 [package.dependencies]
 certifi = "*"
@@ -441,6 +467,7 @@ urllib3 = ">=1.24.1"
 fastimport = ["fastimport"]
 https = ["urllib3 (>=1.24.1)"]
 pgp = ["gpg"]
+watch = ["pyinotify"]
 
 [[package]]
 category = "main"
@@ -481,8 +508,8 @@ category = "dev"
 description = "Faker is a Python package that generates fake data for you."
 name = "faker"
 optional = false
-python-versions = ">=3.4"
-version = "4.1.1"
+python-versions = ">=3.5"
+version = "4.1.2"
 
 [package.dependencies]
 python-dateutil = ">=2.4"
@@ -550,6 +577,14 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "2.10"
 
+[[package]]
+category = "dev"
+description = "Getting image size from png/jpeg/jpeg2000/gif file"
+name = "imagesize"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.2.0"
+
 [[package]]
 category = "main"
 description = "Read metadata from Python packages"
@@ -572,7 +607,7 @@ description = "A port of Ruby on Rails inflector to Python"
 name = "inflection"
 optional = false
 python-versions = ">=3.5"
-version = "0.5.0"
+version = "0.5.1"
 
 [[package]]
 category = "main"
@@ -765,7 +800,7 @@ description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
-version = "8.4.0"
+version = "8.5.0"
 
 [[package]]
 category = "main"
@@ -1122,7 +1157,7 @@ description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.10.0"
+version = "2.10.1"
 
 [package.dependencies]
 coverage = ">=4.4"
@@ -1187,7 +1222,7 @@ description = "A collection of tools for Python"
 name = "pytools"
 optional = false
 python-versions = "~=3.6"
-version = "2020.3.1"
+version = "2020.4"
 
 [package.dependencies]
 appdirs = ">=1.4.0"
@@ -1269,6 +1304,117 @@ optional = false
 python-versions = "*"
 version = "1.3.3"
 
+[[package]]
+category = "dev"
+description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
+name = "snowballstemmer"
+optional = false
+python-versions = "*"
+version = "2.0.0"
+
+[[package]]
+category = "dev"
+description = "Python documentation generator"
+name = "sphinx"
+optional = false
+python-versions = ">=3.5"
+version = "3.2.1"
+
+[package.dependencies]
+Jinja2 = ">=2.3"
+Pygments = ">=2.0"
+alabaster = ">=0.7,<0.8"
+babel = ">=1.3"
+colorama = ">=0.3.5"
+docutils = ">=0.12"
+imagesize = "*"
+packaging = "*"
+requests = ">=2.5.0"
+setuptools = "*"
+snowballstemmer = ">=1.1"
+sphinxcontrib-applehelp = "*"
+sphinxcontrib-devhelp = "*"
+sphinxcontrib-htmlhelp = "*"
+sphinxcontrib-jsmath = "*"
+sphinxcontrib-qthelp = "*"
+sphinxcontrib-serializinghtml = "*"
+
+[package.extras]
+docs = ["sphinxcontrib-websupport"]
+lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-stubs"]
+test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
+
+[[package]]
+category = "dev"
+description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
+name = "sphinxcontrib-applehelp"
+optional = false
+python-versions = ">=3.5"
+version = "1.0.2"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+category = "dev"
+description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
+name = "sphinxcontrib-devhelp"
+optional = false
+python-versions = ">=3.5"
+version = "1.0.2"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+category = "dev"
+description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
+name = "sphinxcontrib-htmlhelp"
+optional = false
+python-versions = ">=3.5"
+version = "1.0.3"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest", "html5lib"]
+
+[[package]]
+category = "dev"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+name = "sphinxcontrib-jsmath"
+optional = false
+python-versions = ">=3.5"
+version = "1.0.1"
+
+[package.extras]
+test = ["pytest", "flake8", "mypy"]
+
+[[package]]
+category = "dev"
+description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
+name = "sphinxcontrib-qthelp"
+optional = false
+python-versions = ">=3.5"
+version = "1.0.3"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+category = "dev"
+description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
+name = "sphinxcontrib-serializinghtml"
+optional = false
+python-versions = ">=3.5"
+version = "1.1.4"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
 [[package]]
 category = "main"
 description = "Non-validating SQL parser"
@@ -1283,7 +1429,7 @@ description = "Computer algebra system (CAS) in Python"
 name = "sympy"
 optional = false
 python-versions = ">=3.5"
-version = "1.6.1"
+version = "1.6.2"
 
 [package.dependencies]
 mpmath = ">=0.19"
@@ -1345,7 +1491,7 @@ description = "Backported and Experimental Type Hints for Python 3.5+"
 name = "typing-extensions"
 optional = false
 python-versions = "*"
-version = "3.7.4.2"
+version = "3.7.4.3"
 
 [[package]]
 category = "main"
@@ -1417,10 +1563,14 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "01dd73eef8ab6b2288514fb1c4a960b92ac62664323f4ef61076cefeee710f64"
+content-hash = "a644567b58bc96e33c93f01ae7b8e8514463be2bf61f6cc0405ce8ea79425230"
 python-versions = "^3.6"
 
 [metadata.files]
+alabaster = [
+    {file = "alabaster-0.7.12-py2.py3-none-any.whl", hash = "sha256:446438bdcca0e05bd45ea2de1668c1d9b032e1a9154c2c259092d77031ddd359"},
+    {file = "alabaster-0.7.12.tar.gz", hash = "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"},
+]
 amqp = [
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@@ -1442,32 +1592,25 @@ atomicwrites = [
     {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
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 attrs = [
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-    {file = "attrs-19.3.0.tar.gz", hash = "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"},
+    {file = "attrs-20.1.0-py2.py3-none-any.whl", hash = "sha256:2867b7b9f8326499ab5b0e2d12801fa5c98842d2cbd22b35112ae04bf85b4dff"},
+    {file = "attrs-20.1.0.tar.gz", hash = "sha256:0ef97238856430dcf9228e07f316aefc17e8939fc8507e18c6501b761ef1a42a"},
+]
+babel = [
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+    {file = "Babel-2.8.0.tar.gz", hash = "sha256:1aac2ae2d0d8ea368fa90906567f5c08463d98ade155c0c4bfedd6a0f7160e38"},
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+    {file = "bcrypt-3.2.0-cp36-abi3-win_amd64.whl", hash = "sha256:81fec756feff5b6818ea7ab031205e1d323d8943d237303baca2c5f9c7846f34"},
+    {file = "bcrypt-3.2.0.tar.gz", hash = "sha256:5b93c1726e50a93a033c36e5ca7fdcd29a5c7395af50a6892f5d9e7c6cfbfb29"},
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 billiard = [
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@@ -1486,34 +1629,34 @@ certifi = [
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 ]
 cffi = [
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@@ -1643,25 +1789,28 @@ docker-pycreds = [
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 ]
+docutils = [
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+]
 dparse = [
     {file = "dparse-0.5.1-py3-none-any.whl", hash = "sha256:e953a25e44ebb60a5c6efc2add4420c177f1d8404509da88da9729202f306994"},
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 ]
 dulwich = [
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-    {file = "dulwich-0.20.5.tar.gz", hash = "sha256:98484ede022da663c96b54bc8dcdb4407072cb50efd5d20d58ca4e7779931305"},
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+    {file = "dulwich-0.20.6-cp37-cp37m-macosx_10_14_x86_64.whl", hash = "sha256:304f52b10c49c3a6ddfbd73e2e93d8e979350225cfba9688e51110e74fa2f718"},
+    {file = "dulwich-0.20.6-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:2f4aebc54ed2d37dcee737024421452375570a422eb682232e676aa7ebc9cb4b"},
+    {file = "dulwich-0.20.6-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:4fee359928c59b53af153a582a7ed7595259a5a825df400301a29e17fd78dfd3"},
+    {file = "dulwich-0.20.6-cp37-cp37m-win_amd64.whl", hash = "sha256:8f7a7f973be2beedfb10dd8d3eb6bdf9ec466c72ad555704897cbd6357fe5021"},
+    {file = "dulwich-0.20.6-cp38-cp38-macosx_10_14_x86_64.whl", hash = "sha256:2452a0379cc7bbbd7ab893ec104d18039f1ea98b0d6be6bca5646e5cf29e0ae9"},
+    {file = "dulwich-0.20.6-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:49e747c72d9099e873bf6196260346d5996c3f28af788294d47a8accdc524de7"},
+    {file = "dulwich-0.20.6-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:50ef300a9fa4efd9f85009c2bd8b515266ec1529400f8834f85c04fa9f09b2c0"},
+    {file = "dulwich-0.20.6-cp38-cp38-win_amd64.whl", hash = "sha256:5348310f21b2a23847342ce464461499b6652483fa42de03714d0f6421a99698"},
+    {file = "dulwich-0.20.6.tar.gz", hash = "sha256:e593f514b8ac740b4ceeb047745b4719bfc9f334904245c6edcb3a9d002f577b"},
 ]
 ecdsa = [
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@@ -1676,8 +1825,8 @@ factory-boy = [
     {file = "factory_boy-2.12.0.tar.gz", hash = "sha256:faf48d608a1735f0d0a3c9cbf536d64f9132b547dae7ba452c4d99a79e84a370"},
 ]
 faker = [
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-    {file = "Faker-4.1.1.tar.gz", hash = "sha256:c006b3664c270a2cfd4785c5e41ff263d48101c4e920b5961cf9c237131d8418"},
+    {file = "Faker-4.1.2-py3-none-any.whl", hash = "sha256:bc4b8c908dfcd84e4fe5d9fa2e52fbe17546515fb8f126909b98c47badf05658"},
+    {file = "Faker-4.1.2.tar.gz", hash = "sha256:ff188c416864e3f7d8becd8f9ee683a4b4101a2a2d2bcdcb3e84bb1bdd06eaae"},
 ]
 flake8 = [
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@@ -1698,13 +1847,17 @@ idna = [
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     {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
 ]
+imagesize = [
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+    {file = "imagesize-1.2.0.tar.gz", hash = "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"},
+]
 importlib-metadata = [
     {file = "importlib_metadata-1.7.0-py2.py3-none-any.whl", hash = "sha256:dc15b2969b4ce36305c51eebe62d418ac7791e9a157911d58bfb1f9ccd8e2070"},
     {file = "importlib_metadata-1.7.0.tar.gz", hash = "sha256:90bb658cdbbf6d1735b6341ce708fc7024a3e14e99ffdc5783edea9f9b077f83"},
 ]
 inflection = [
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-    {file = "inflection-0.5.0.tar.gz", hash = "sha256:f576e85132d34f5bf7df5183c2c6f94cfb32e528f53065345cf71329ba0b8924"},
+    {file = "inflection-0.5.1-py2.py3-none-any.whl", hash = "sha256:f38b2b640938a4f35ade69ac3d053042959b62a0f1076a5bbaa1b9526605a8a2"},
+    {file = "inflection-0.5.1.tar.gz", hash = "sha256:1a29730d366e996aaacffb2f1f1cb9593dc38e2ddd30c91250c6dde09ea9b417"},
 ]
 ipaddress = [
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@@ -1790,8 +1943,8 @@ mistune = [
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 ]
 more-itertools = [
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-    {file = "more_itertools-8.4.0-py3-none-any.whl", hash = "sha256:b78134b2063dd214000685165d81c154522c3ee0a1c0d4d113c80361c234c5a2"},
+    {file = "more-itertools-8.5.0.tar.gz", hash = "sha256:6f83822ae94818eae2612063a5101a7311e68ae8002005b5e05f03fd74a86a20"},
+    {file = "more_itertools-8.5.0-py3-none-any.whl", hash = "sha256:9b30f12df9393f0d28af9210ff8efe48d10c94f73e5daf886f10c4b0b0b4f03c"},
 ]
 mpmath = [
     {file = "mpmath-1.1.0.tar.gz", hash = "sha256:fc17abe05fbab3382b61a123c398508183406fa132e0223874578e20946499f6"},
@@ -1952,8 +2105,8 @@ pytest = [
     {file = "pytest-5.4.3.tar.gz", hash = "sha256:7979331bfcba207414f5e1263b5a0f8f521d0f457318836a7355531ed1a4c7d8"},
 ]
 pytest-cov = [
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-    {file = "pytest_cov-2.10.0-py2.py3-none-any.whl", hash = "sha256:6e6d18092dce6fad667cd7020deed816f858ad3b49d5b5e2b1cc1c97a4dba65c"},
+    {file = "pytest-cov-2.10.1.tar.gz", hash = "sha256:47bd0ce14056fdd79f93e1713f88fad7bdcc583dcd7783da86ef2f085a0bb88e"},
+    {file = "pytest_cov-2.10.1-py2.py3-none-any.whl", hash = "sha256:45ec2d5182f89a81fc3eb29e3d1ed3113b9e9a873bcddb2a71faaab066110191"},
 ]
 pytest-django = [
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@@ -1971,7 +2124,7 @@ python-memcached = [
     {file = "python_memcached-1.59-py2.py3-none-any.whl", hash = "sha256:4dac64916871bd3550263323fc2ce18e1e439080a2d5670c594cf3118d99b594"},
 ]
 pytools = [
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+    {file = "pytools-2020.4.tar.gz", hash = "sha256:37db39ff11a1b5fc8aec875ae4ddb3d6c21aa0e95bddc9c841aa98e1631ae460"},
 ]
 pytz = [
     {file = "pytz-2020.1-py2.py3-none-any.whl", hash = "sha256:a494d53b6d39c3c6e44c3bec237336e14305e4f29bbf800b599253057fbb79ed"},
@@ -2019,13 +2172,45 @@ six = [
 sleekxmpp = [
     {file = "sleekxmpp-1.3.3.tar.gz", hash = "sha256:d213c1de71d92505f95ced0460ee0f84fdc4ddcacb7d7dd343739ed4028e5569"},
 ]
+snowballstemmer = [
+    {file = "snowballstemmer-2.0.0-py2.py3-none-any.whl", hash = "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0"},
+    {file = "snowballstemmer-2.0.0.tar.gz", hash = "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"},
+]
+sphinx = [
+    {file = "Sphinx-3.2.1-py3-none-any.whl", hash = "sha256:ce6fd7ff5b215af39e2fcd44d4a321f6694b4530b6f2b2109b64d120773faea0"},
+    {file = "Sphinx-3.2.1.tar.gz", hash = "sha256:321d6d9b16fa381a5306e5a0b76cd48ffbc588e6340059a729c6fdd66087e0e8"},
+]
+sphinxcontrib-applehelp = [
+    {file = "sphinxcontrib-applehelp-1.0.2.tar.gz", hash = "sha256:a072735ec80e7675e3f432fcae8610ecf509c5f1869d17e2eecff44389cdbc58"},
+    {file = "sphinxcontrib_applehelp-1.0.2-py2.py3-none-any.whl", hash = "sha256:806111e5e962be97c29ec4c1e7fe277bfd19e9652fb1a4392105b43e01af885a"},
+]
+sphinxcontrib-devhelp = [
+    {file = "sphinxcontrib-devhelp-1.0.2.tar.gz", hash = "sha256:ff7f1afa7b9642e7060379360a67e9c41e8f3121f2ce9164266f61b9f4b338e4"},
+    {file = "sphinxcontrib_devhelp-1.0.2-py2.py3-none-any.whl", hash = "sha256:8165223f9a335cc1af7ffe1ed31d2871f325254c0423bc0c4c7cd1c1e4734a2e"},
+]
+sphinxcontrib-htmlhelp = [
+    {file = "sphinxcontrib-htmlhelp-1.0.3.tar.gz", hash = "sha256:e8f5bb7e31b2dbb25b9cc435c8ab7a79787ebf7f906155729338f3156d93659b"},
+    {file = "sphinxcontrib_htmlhelp-1.0.3-py2.py3-none-any.whl", hash = "sha256:3c0bc24a2c41e340ac37c85ced6dafc879ab485c095b1d65d2461ac2f7cca86f"},
+]
+sphinxcontrib-jsmath = [
+    {file = "sphinxcontrib-jsmath-1.0.1.tar.gz", hash = "sha256:a9925e4a4587247ed2191a22df5f6970656cb8ca2bd6284309578f2153e0c4b8"},
+    {file = "sphinxcontrib_jsmath-1.0.1-py2.py3-none-any.whl", hash = "sha256:2ec2eaebfb78f3f2078e73666b1415417a116cc848b72e5172e596c871103178"},
+]
+sphinxcontrib-qthelp = [
+    {file = "sphinxcontrib-qthelp-1.0.3.tar.gz", hash = "sha256:4c33767ee058b70dba89a6fc5c1892c0d57a54be67ddd3e7875a18d14cba5a72"},
+    {file = "sphinxcontrib_qthelp-1.0.3-py2.py3-none-any.whl", hash = "sha256:bd9fc24bcb748a8d51fd4ecaade681350aa63009a347a8c14e637895444dfab6"},
+]
+sphinxcontrib-serializinghtml = [
+    {file = "sphinxcontrib-serializinghtml-1.1.4.tar.gz", hash = "sha256:eaa0eccc86e982a9b939b2b82d12cc5d013385ba5eadcc7e4fed23f4405f77bc"},
+    {file = "sphinxcontrib_serializinghtml-1.1.4-py2.py3-none-any.whl", hash = "sha256:f242a81d423f59617a8e5cf16f5d4d74e28ee9a66f9e5b637a18082991db5a9a"},
+]
 sqlparse = [
     {file = "sqlparse-0.3.1-py2.py3-none-any.whl", hash = "sha256:022fb9c87b524d1f7862b3037e541f68597a730a8843245c349fc93e1643dc4e"},
     {file = "sqlparse-0.3.1.tar.gz", hash = "sha256:e162203737712307dfe78860cc56c8da8a852ab2ee33750e33aeadf38d12c548"},
 ]
 sympy = [
-    {file = "sympy-1.6.1-py3-none-any.whl", hash = "sha256:7f50d922bf055560429777447ac827620fd86d39d1de4ea057422e7552c65f3b"},
-    {file = "sympy-1.6.1.tar.gz", hash = "sha256:7386dba4f7e162e90766b5ea7cab5938c2fe3c620b310518c8ff504b283cb15b"},
+    {file = "sympy-1.6.2-py3-none-any.whl", hash = "sha256:0f6c5724a999eca02f4b453260b0c7151d6fa076313f441274db98bbf97ba8cd"},
+    {file = "sympy-1.6.2.tar.gz", hash = "sha256:1cfadcc80506e4b793f5b088558ca1fcbeaec24cd6fc86f1fdccaa3ee1d48708"},
 ]
 testpath = [
     {file = "testpath-0.4.4-py2.py3-none-any.whl", hash = "sha256:bfcf9411ef4bf3db7579063e0546938b1edda3d69f4e1fb8756991f5951f85d4"},
@@ -2067,9 +2252,9 @@ typed-ast = [
     {file = "typed_ast-1.4.1.tar.gz", hash = "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b"},
 ]
 typing-extensions = [
-    {file = "typing_extensions-3.7.4.2-py2-none-any.whl", hash = "sha256:f8d2bd89d25bc39dabe7d23df520442fa1d8969b82544370e03d88b5a591c392"},
-    {file = "typing_extensions-3.7.4.2-py3-none-any.whl", hash = "sha256:6e95524d8a547a91e08f404ae485bbb71962de46967e1b71a0cb89af24e761c5"},
-    {file = "typing_extensions-3.7.4.2.tar.gz", hash = "sha256:79ee589a3caca649a9bfd2a8de4709837400dfa00b6cc81962a1e6a1815969ae"},
+    {file = "typing_extensions-3.7.4.3-py2-none-any.whl", hash = "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"},
+    {file = "typing_extensions-3.7.4.3-py3-none-any.whl", hash = "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918"},
+    {file = "typing_extensions-3.7.4.3.tar.gz", hash = "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c"},
 ]
 unicodecsv = [
     {file = "unicodecsv-0.14.1.tar.gz", hash = "sha256:018c08037d48649a0412063ff4eda26eaa81eff1546dbffa51fa5293276ff7fc"},
diff --git a/pyproject.toml b/pyproject.toml
index 7bb80d06f6741ea5a91a16eb67e2b473383e3227..eb46e7a7ca9d6f5485e05dcf8147b4e729b2348c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ relate = "relate.bin.relate:main"
 
 [tool.poetry.dependencies]
 python = "^3.6"
-django = "^3.0.7"
+django = "^3.0.10,<3.1"
 # Automatically renders Django forms in a pretty, Bootstrap-compatible way.
 django-crispy-forms = ">=1.5.1"
 # Page data, answer data, ... all represented in JSON. This makes that editable in the Django admin.
@@ -83,7 +83,7 @@ python-memcached = "^1.59"
 # A task queue, used to execute long-running tasks
 celery = "^4.3.0"
 kombu = "*"
-django-celery-results = "1.0.1"
+django-celery-results = "^1.2.1"
 # For searchable select widgets
 django_select2 = "^7.4.2"
 
@@ -113,5 +113,6 @@ pytest-django = "^3.9.0"
 pytest-factoryboy = "^2.0.3"
 pytest-cov = "^2.10.0"
 safety = "^1.9.0"
+sphinx = "^3.2.1"
 
 # vim: foldmethod=marker