diff --git a/requirements-doc.freeze b/requirements-doc.freeze
index 5b17d3ae..8104cfd9 100644
--- a/requirements-doc.freeze
+++ b/requirements-doc.freeze
@@ -1,78 +1,80 @@
-alabaster==0.7.11
-apipkg==1.5
-appnope==0.1.0
-atomicwrites==1.1.5
-attrs==18.1.0
-Babel==2.6.0
-backcall==0.1.0
-certifi==2018.4.16
-chardet==3.0.4
-codecov==2.0.15
-coverage==4.5.1
-decorator==4.3.0
-Django==2.1
-django-debug-toolbar==1.9.1
-django-haystack==2.8.1
-django-js-asset==1.1.0
-django-machina==0.7.1
-django-mptt==0.9.1
-django-widget-tweaks==1.4.2
-docutils==0.14
-execnet==1.5.0
-factory-boy==2.11.1
-Faker==0.8.17
-flake8==3.5.0
-idna==2.7
-imagesize==1.0.0
-ipython==6.5.0
-ipython-genutils==0.2.0
-isort==4.3.4
-jedi==0.12.1
-Jinja2==2.10
-markdown2==2.3.5
-MarkupSafe==1.0
-mccabe==0.6.1
-mock==2.0.0
-more-itertools==4.3.0
-packaging==17.1
-parso==0.3.1
-pbr==4.2.0
-pexpect==4.6.0
-pickleshare==0.7.4
-Pillow==5.2.0
-pluggy==0.7.1
-prompt-toolkit==1.0.15
-ptyprocess==0.6.0
-py==1.5.4
-pycodestyle==2.3.1
-pyflakes==1.6.0
-Pygments==2.2.0
-pyparsing==2.2.0
-pytest==3.7.1
-pytest-cov==2.5.1
-pytest-django==3.3.3
-pytest-forked==0.2
-pytest-pythonpath==0.7.2
-pytest-spec==1.1.0
-pytest-sugar==0.9.1
-pytest-xdist==1.22.5
-python-dateutil==2.7.3
-python-slugify==1.2.5
-pytz==2018.5
-requests==2.19.1
-simplegeneric==0.8.1
-six==1.11.0
-snowballstemmer==1.2.1
-Sphinx==1.7.6
-sphinx-rtd-theme==0.4.1
-sphinxcontrib-websupport==1.1.0
-sqlparse==0.2.4
-termcolor==1.1.0
-text-unidecode==1.2
-traitlets==4.3.2
-transifex-client==0.13.4
-Unidecode==1.0.22
-Unipath==1.1
-urllib3==1.23
-wcwidth==0.1.7
-Whoosh==2.7.4
+alabaster==0.7.12; python_version >= "3.5"
+apipkg==1.5; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+appnope==0.1.2; sys_platform == "darwin" and python_version >= "3.5"
+atomicwrites==1.4.0; python_version >= "3.5" and python_full_version < "3.0.0" and sys_platform == "win32" or python_full_version >= "3.5.0" and sys_platform == "win32" and python_version >= "3.5"
+attrs==20.3.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+babel==2.9.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.5"
+backcall==0.2.0; python_version >= "3.5"
+certifi==2020.12.5; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
+chardet==4.0.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
+codecov==2.1.11; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.4.0")
+colorama==0.4.4; python_version >= "3.5" and python_full_version < "3.0.0" and sys_platform == "win32" or python_full_version >= "3.5.0" and sys_platform == "win32" and python_version >= "3.5"
+coverage==5.5; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version < "4"
+decorator==4.4.2; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.2.0" and python_version >= "3.5"
+django-debug-toolbar==3.1.1; python_version >= "3.5"
+django-haystack==3.0
+django-js-asset==1.2.2; python_version >= "3.5"
+django-mptt==0.11.0; python_version >= "3.5"
+django-widget-tweaks==1.4.8
+django==2.2.19; python_version >= "3.5"
+docutils==0.16; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+execnet==1.8.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+factory-boy==3.1.0; python_version >= "3.5"
+faker==5.0.0; python_version >= "3.5"
+flake8==3.8.4; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.4.0")
+idna==2.10; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
+imagesize==1.2.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.5"
+importlib-metadata==2.1.1; python_version >= "3.5" and python_full_version < "3.0.0" and python_version < "3.8" and (python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5") or python_full_version >= "3.5.0" and python_version < "3.8" and python_version >= "3.5" and (python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5")
+iniconfig==1.1.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+ipython-genutils==0.2.0; python_version >= "3.5"
+ipython==7.9.0; python_version >= "3.5"
+isort==4.3.21; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.4.0")
+jedi==0.17.2; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+jinja2==2.11.3; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+markdown2==2.4.0; python_version >= "3.5" and python_version < "4"
+markupsafe==1.1.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+mccabe==0.6.1; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.4.0"
+mock==3.0.5; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.4.0")
+packaging==20.9; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+parso==0.7.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+pathlib2==2.3.5; python_version < "3.6" and python_version >= "3.5" and (python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5")
+pexpect==4.8.0; sys_platform != "win32" and python_version >= "3.5"
+pickleshare==0.7.5; python_version >= "3.5"
+pillow==7.2.0; python_version >= "3.5"
+pluggy==0.13.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+prompt-toolkit==2.0.10; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.3.0" and python_version >= "3.5"
+ptyprocess==0.7.0; sys_platform != "win32" and python_version >= "3.5"
+py==1.10.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+pycodestyle==2.6.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.4.0"
+pyflakes==2.2.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.4.0"
+pygments==2.8.1; python_version >= "3.5"
+pyparsing==2.4.7; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.5"
+pytest-cov==2.11.1; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
+pytest-django==4.1.0; python_version >= "3.5"
+pytest-forked==1.3.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+pytest-pythonpath==0.7.3
+pytest-spec==3.1.0
+pytest-xdist==2.2.1; python_version >= "3.5"
+pytest==6.1.2; python_version >= "3.5"
+python-dateutil==2.8.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.3.0" and python_version >= "3.5"
+pytz==2021.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.5"
+requests==2.25.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+six==1.15.0; python_version >= "3.5" and python_full_version < "3.0.0" and python_version < "3.6" or python_full_version >= "3.4.0" and python_version >= "3.5" and python_version < "3.6"
+snowballstemmer==2.1.0; python_version >= "3.5"
+sphinx-rtd-theme==0.5.1
+sphinx==3.5.2; python_version >= "3.5"
+sphinxcontrib-applehelp==1.0.2; python_version >= "3.5"
+sphinxcontrib-devhelp==1.0.2; python_version >= "3.5"
+sphinxcontrib-htmlhelp==1.0.3; python_version >= "3.5"
+sphinxcontrib-jsmath==1.0.1; python_version >= "3.5"
+sphinxcontrib-qthelp==1.0.3; python_version >= "3.5"
+sphinxcontrib-serializinghtml==1.1.4; python_version >= "3.5"
+sqlparse==0.4.1; python_version >= "3.5"
+text-unidecode==1.3; python_version >= "3.5"
+toml==0.10.2; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
+traitlets==4.3.3; python_version >= "3.5"
+urllib3==1.26.3; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version < "4"
+wcwidth==0.2.5; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.3.0" and python_version >= "3.5"
+whoosh==2.7.4
+win-unicode-console==0.5; sys_platform == "win32" and python_version < "3.6" and python_version >= "3.5"
+zipp==1.2.0; python_version < "3.8" and python_version >= "2.7" and (python_version >= "2.7" and python_full_version < "3.0.0" and python_version < "3.8" or python_full_version >= "3.5.0" and python_version < "3.8")