diff --git a/bin/sphinx_push_ghpages.sh b/bin/sphinx_push_ghpages.sh
new file mode 100755
index 00000000000..6dc9efd931f
--- /dev/null
+++ b/bin/sphinx_push_ghpages.sh
@@ -0,0 +1,78 @@
+#!/bin/bash
+
+# This script replicates basic `sphinx-versioning push` functionality for
+# sphinx-multiversion. It should be run from the base of the git repo.
+# It's largely based on sphinxcontrib-versioning's code:
+# https://github.com/sphinx-contrib/sphinxcontrib-versioning/blob/920edec0ac764081b583a2ecf4e6952762b9dbf2/sphinxcontrib/versioning/__main__.py#L332
+
+set -e -u -o pipefail
+
+# Branch to push the generated docs to.
+PAGES_BRANCH=gh-pages
+# Which branch to store at the root of the docs. Analogous to scv_root_ref:
+# https://sphinxcontrib-versioning.readthedocs.io/en/latest/settings.html#cmdoption-r
+ROOT_REF=development
+# Files to keep in the repo. Analogous to scv_grm_exclude:
+# https://sphinxcontrib-versioning.readthedocs.io/en/latest/settings.html#cmdoption-e
+KEEP_FILES=(.nojekyll CNAME README.md shippable.yml)
+
+# get origin repo. assumes fetch and pull locations are the same.
+REPO=$(git remote -v | grep origin | awk 'NR==1 { print $2 }')
+TMPDIR=$(mktemp -d ./tmp-sphinx.XXX)
+
+
+## prepare helper repo
+
+# clone into temp dir
+echo -e "\n-> cloning $REPO to temp dir $TMPDIR..."
+cd "$TMPDIR"
+git clone "$REPO" --quiet --depth=1 --branch="${PAGES_BRANCH}" .
+# remove old files
+git rm -rf --quiet .
+# restore some files we want to keep. note: using bash array syntax.
+git reset --quiet HEAD -- "${KEEP_FILES[@]}"
+git checkout -- "${KEEP_FILES[@]}"
+
+
+## build docs
+
+echo -e "\n-> building docs..."
+# 'sphinx-multiversion ../docs .' fails, so we just cd back out for this step.
+cd ..
+sphinx-multiversion docs "$TMPDIR"
+cd "$TMPDIR"
+
+# With sphinxcontrib-versioning, we would generate a separate directory of docs
+# for each version tag and branch, but also have the 'development' branch's
+# docs at the top level.  sphinx-multiversion only generates the separate
+# directories. To avoid breaking links, we copy the the root ref docs (i.e.,
+# the development branch docs) to the parent directory containing all docs.
+echo -e "\n-> copying root ref ($ROOT_REF) to docs root..."
+cp -R "${ROOT_REF}/." .
+
+echo -e "\n-> checking for changes..."
+git add .
+# ignore trivial changes (.doctrees and .buildinfo files are always modified
+# when rebuilding the docs). Notes:
+# - '|| true' is needed because when grep fails to match something, it returns
+#   a non-zero exit code, which causes the script to fail due to the 'pipefail'
+#   setting.
+# - this logic differs from sphinxcontrib-versioning slightly. SCV ignores
+#   searchindex.js but not .buildinfo. I didn't notice searchindex.js being
+#   regenerated unnecessarily, but did see that happening with .buildinfo files.
+CHANGED=$(git diff HEAD --no-ext-diff --name-status | grep -v '^M.*\.doctrees/' | grep -v '^M.*\.buildinfo$' || true)
+if [ -z "$CHANGED" ]; then
+  echo -e "\n-> no changes, done!"
+  exit 0
+else
+  echo -e "\n-> found changed files:"
+  echo "$CHANGED"
+fi
+
+echo -e "\n-> committing change..."
+git commit -m "sphinx_push_ghpages.sh: autocommit $(date '+%Y-%m-%d %H:%M:%S')"
+
+echo -e "\n-> pushing update..."
+git push origin "$PAGES_BRANCH"
+
+echo -e "\n-> done!"
diff --git a/docs/README.md b/docs/README.md
index 8458ed6a2db..8004649ad2b 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -23,15 +23,15 @@ open up and view in a web browser.
 
 ## Automatic builds
 
-Every time continuous integration runs it should be re-building the
-documentation for any currently-open branches and pushing the result to the
-`gh-pages` branch. If you edit any documentation pages or docstrings, it should
-be a part of the Pull Request review process that you navigate to your feature
-branch's built documentation and verify that the changes are as intended.
-
-Note that branches aren't listed in the version-selector widget (since we don't
-want to show it to external users), but you can navigate directly to it:
+Every time continuous integration runs, it re-builds the documentation for any
+currently-open branches and pushes the result to the `gh-pages` branch (even
+for unmerged pull requests). If you edit any documentation pages or docstrings,
+navigate to your feature branch's documentation and verify that the changes are
+as intended.
+
+Branches aren't listed in the version-selector widget (since we don't want to
+show them to external users). You have to edit the URL manually:
 `https://developers.gro-intelligence.com/<YOUR-BRANCH-NAME-HERE>/index.html`
 
 If anything in continuous integration fails, the documentation building step is
-skipped.
+skipped. CI calls `bin/sphinx_push_ghpages.sh` to build and push the docs.
diff --git a/docs/_static/css/banner.css b/docs/_static/css/banner.css
index 554e837baf2..6b3c7473394 100644
--- a/docs/_static/css/banner.css
+++ b/docs/_static/css/banner.css
@@ -1,29 +1,26 @@
-/* https://github.com/sphinx-contrib/sphinxcontrib-versioning/blob/master/sphinxcontrib/versioning/_static/banner.css */
-
-.scv-banner {
-  padding: 3px;
-  border-radius: 2px;
-  font-size: 80%;
-  text-align: center;
-  color: white;
-  background: #2980B9;
+/* based on https://github.com/sphinx-contrib/sphinxcontrib-versioning/blob/master/sphinxcontrib/versioning/_static/banner.css */
+
+.version-banner {
+    padding: 3px;
+    border-radius: 2px;
+    font-size: 80%;
+    text-align: center;
+    color: white;
+    background: #d40 linear-gradient(-45deg,
+        rgba(255, 255, 255, 0.2) 0%,
+        rgba(255, 255, 255, 0.2) 25%,
+        transparent 25%,
+        transparent 50%,
+        rgba(255, 255, 255, 0.2) 50%,
+        rgba(255, 255, 255, 0.2) 75%,
+        transparent 75%,
+        transparent
+    );
+    background-size: 28px 28px;
+    /* from sphinx_rtd_theme selector: use bluish background */
+    background-color: #2980B9;
 }
 
-.scv-banner > a {
-  color: white;
+.version-banner a, .version-banner a:visited {
+    color: white;
 }
-
-
-.scv-bizstyle {
-  background-color: #336699;
-}
-
-
-.scv-classic {
-  text-align: center !important;
-}
-
-
-.scv-traditional {
-  text-align: center !important;
-}
\ No newline at end of file
diff --git a/docs/_static/css/custom-theme.css b/docs/_static/css/custom-theme.css
index ce94bbf94f3..4611708d31a 100644
--- a/docs/_static/css/custom-theme.css
+++ b/docs/_static/css/custom-theme.css
@@ -231,8 +231,3 @@ a > code {
   font-weight: 500;
   color: #9b9b9e;
 }
-
-/* hide branches from version switcher */
-.rst-other-versions dl:last-child {
-  display: none;
-} 
diff --git a/docs/_templates/page.html b/docs/_templates/page.html
new file mode 100644
index 00000000000..3d7556a1b40
--- /dev/null
+++ b/docs/_templates/page.html
@@ -0,0 +1,24 @@
+{#
+See https://holzhaus.github.io/sphinx-multiversion/master/templates.html#version-banners
+
+TODO(jli): The example above nicely links to the latest *released* version,
+rather than development. That's probably the way to go, since almost all users
+should be using our PyPI package. However, the 'latest_version' variable seems
+to be hardcoded to "master". Would be great if it actually used the latest
+released tag instead.
+
+Also see: https://github.com/Holzhaus/sphinx-multiversion/issues/58
+#}
+
+{% extends "!page.html" %}
+{% block body %}
+{% if current_version and current_version.name != 'development' %}
+<p class="version-banner">
+  <strong>Note:</strong>
+  This document is for an older version of the Gro API Client.
+  Please see the <a href="{{ vpathto('development') }}">latest documentation</a>.
+</p>
+{% endif %}
+{{ super() }}
+{% endblock %}%
+
diff --git a/docs/_templates/versions.html b/docs/_templates/versions.html
new file mode 100644
index 00000000000..fadace6b05f
--- /dev/null
+++ b/docs/_templates/versions.html
@@ -0,0 +1,34 @@
+{#
+Based on https://holzhaus.github.io/sphinx-multiversion/master/templates.html#readthedocs-theme
+This is the template for the version-selector widget at the bottom left corner.
+We list the tags as "Releases", and we include the "development" branch at the
+end of the list.
+#}
+{%- if current_version %}
+<div class="rst-versions" data-toggle="rst-versions" role="note" aria-label="versions">
+  <span class="rst-current-version" data-toggle="rst-current-version">
+    <span class="fa fa-book"> Other Versions</span>
+    v: {{ current_version.name }}
+    <span class="fa fa-caret-down"></span>
+  </span>
+  <div class="rst-other-versions">
+    {%- if versions.tags %}
+    <dl>
+      <dt>Releases</dt>
+      {%- for item in versions.tags %}
+      <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+      {%- endfor %}
+
+      {# we also list the development branch here so that it's always accessible. #}
+      {%- if versions.branches %}
+        {%- for item in versions.branches %}
+          {%- if item.name == 'development' %}
+            <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+          {%- endif %}
+        {%- endfor %}
+      {%- endif %}
+    </dl>
+    {%- endif %}
+  </div>
+</div>
+{%- endif %}
diff --git a/docs/conf.py b/docs/conf.py
index 6175046d191..04bce0009b8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -12,7 +12,6 @@
 #
 import os
 import sys
-import re
 sys.path.insert(0, os.path.abspath('..'))
 
 
@@ -36,7 +35,8 @@
     'sphinx.ext.extlinks',
     'sphinx.ext.napoleon',
     'sphinx.ext.viewcode',
-    'recommonmark'
+    'recommonmark',
+    'sphinx_multiversion'
 ]
 
 source_suffix = {
@@ -84,16 +84,24 @@
 
 master_doc = 'index'
 
-# Do not delete these files:
-scv_grm_exclude = ('README.md', '.gitignore', '.nojekyll', 'CNAME', 'shippable.yml*')
-scv_show_banner = True
-scv_banner_main_ref = 'development'
-scv_root_ref = 'development'
 
-# still build other branches, but hide the version selectors in _static/css/custom-theme.css.
-# Uncomment this line to stop building them altogether:
-# scv_whitelist_branches = ('development',)
+# -- sphinx-multiversion options ---------------------------------------------
 
-# Omit versions before docs style was finalized
-# TODO: https://stackoverflow.com/questions/26141851/let-sphinx-use-version-from-setup-py
-scv_whitelist_tags = (re.compile(r'^(?!.*(v1.40.0|v1.40.1|v1.40.2|v1.40.3|v1.40.4|v1.40.5)).*$'),)
+# v1.40.6 (from 2019-12-19) is the first version with finalized docs style.
+# so, we ignore all other releases that preceded that.
+smv_tag_whitelist = r'^v(?!1\.40\.[012345]).+$'
+
+# By default, sphinx-multiversion doesn't build remote branches. We want to
+# build all branches, so we sent the pattern to something that matches
+# everything.
+smv_remote_whitelist = r'.'
+
+# Exclude the 'HEAD' ref from being built. Due to building remote refs with
+# smv_remote_whitelist, SMV will build the remotes/origin/HEAD ref. This is
+# equivalent to the 'development' branch, so no need to build it again.
+smv_branch_whitelist = r'^(?!HEAD).*$'
+
+# Note: see bin/sphinx_push_ghpages.sh for how we push new documentation to
+# GitHub Pages. Some options related to pushing docs changes that used to be
+# set here for sphinxcontrib-versioning are now configured in the script, since
+# sphinx-multiversion doesn't have built-in support for pushing changes.
diff --git a/poetry.lock b/poetry.lock
index 5f74a53c46c..edea9d69fe6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -16,21 +16,21 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "20.2.0"
+version = "20.3.0"
 description = "Classes Without Boilerplate"
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
-dev = ["coverage[toml] (>=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"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
 [[package]]
 name = "babel"
-version = "2.8.0"
+version = "2.9.0"
 description = "Internationalization utilities"
 category = "main"
 optional = true
@@ -41,7 +41,7 @@ pytz = ">=2015.7"
 
 [[package]]
 name = "certifi"
-version = "2020.6.20"
+version = "2020.11.8"
 description = "Python package for providing Mozilla's CA Bundle."
 category = "main"
 optional = false
@@ -55,14 +55,6 @@ category = "main"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "click"
-version = "7.1.2"
-description = "Composable command line interface toolkit"
-category = "main"
-optional = true
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
 [[package]]
 name = "colorama"
 version = "0.4.4"
@@ -71,14 +63,6 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
-[[package]]
-name = "colorclass"
-version = "2.2.0"
-description = "Colorful worry-free console applications for Linux, Mac OS X, and Windows."
-category = "main"
-optional = true
-python-versions = "*"
-
 [[package]]
 name = "commonmark"
 version = "0.9.1"
@@ -127,18 +111,18 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "2.0.0"
+version = "3.1.0"
 description = "Read metadata from Python packages"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+testing = ["packaging", "pep517", "unittest2", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "iniconfig"
@@ -185,7 +169,7 @@ test = ["pytest", "pytest-cov"]
 
 [[package]]
 name = "numpy"
-version = "1.19.2"
+version = "1.19.4"
 description = "NumPy is the fundamental package for array computing with Python."
 category = "main"
 optional = false
@@ -193,27 +177,26 @@ python-versions = ">=3.6"
 
 [[package]]
 name = "packaging"
-version = "20.4"
+version = "20.7"
 description = "Core utilities for Python packages"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
-six = "*"
 
 [[package]]
 name = "pandas"
-version = "0.25.3"
+version = "1.1.4"
 description = "Powerful data structures for data analysis, time series, and statistics"
 category = "main"
 optional = false
-python-versions = ">=3.5.3"
+python-versions = ">=3.6.1"
 
 [package.dependencies]
-numpy = ">=1.13.3"
-python-dateutil = ">=2.6.1"
+numpy = ">=1.15.4"
+python-dateutil = ">=2.7.3"
 pytz = ">=2017.2"
 
 [package.extras]
@@ -253,7 +236,7 @@ python-versions = ">=3.5"
 name = "pyparsing"
 version = "2.4.7"
 description = "Python parsing module"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
@@ -308,7 +291,7 @@ six = ">=1.5"
 
 [[package]]
 name = "pytz"
-version = "2020.1"
+version = "2020.4"
 description = "World timezone definitions, modern and historical"
 category = "main"
 optional = false
@@ -329,7 +312,7 @@ sphinx = ">=1.3.1"
 
 [[package]]
 name = "requests"
-version = "2.24.0"
+version = "2.25.0"
 description = "Python HTTP for Humans."
 category = "main"
 optional = false
@@ -339,7 +322,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 certifi = ">=2017.4.17"
 chardet = ">=3.0.2,<4"
 idna = ">=2.5,<3"
-urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
@@ -363,27 +346,45 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "1.5.6"
+version = "3.1.2"
 description = "Python documentation generator"
 category = "main"
 optional = true
-python-versions = "*"
+python-versions = ">=3.5"
 
 [package.dependencies]
 alabaster = ">=0.7,<0.8"
-babel = ">=1.3,<2.0 || >2.0"
+babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
-docutils = ">=0.11"
+docutils = ">=0.12"
 imagesize = "*"
 Jinja2 = ">=2.3"
+packaging = "*"
 Pygments = ">=2.0"
-requests = ">=2.0.0"
-six = ">=1.5"
+requests = ">=2.5.0"
 snowballstemmer = ">=1.1"
+sphinxcontrib-applehelp = "*"
+sphinxcontrib-devhelp = "*"
+sphinxcontrib-htmlhelp = "*"
+sphinxcontrib-jsmath = "*"
+sphinxcontrib-qthelp = "*"
+sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
-test = ["html5lib", "mock", "pytest", "simplejson"]
-websupport = ["sqlalchemy (>=0.9)", "whoosh (>=2.0)"]
+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]]
+name = "sphinx-multiversion"
+version = "0.2.4"
+description = "Add support for multiple versions to sphinx"
+category = "main"
+optional = true
+python-versions = "*"
+
+[package.dependencies]
+sphinx = ">=2.1"
 
 [[package]]
 name = "sphinx-rtd-theme"
@@ -400,29 +401,87 @@ sphinx = "*"
 dev = ["transifex-client", "sphinxcontrib-httpdomain", "bump2version"]
 
 [[package]]
-name = "sphinxcontrib-versioning"
-version = "2.2.1"
-description = "Sphinx extension that allows building versioned docs for self-hosting."
+name = "sphinxcontrib-applehelp"
+version = "1.0.2"
+description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
 category = "main"
 optional = true
-python-versions = "*"
+python-versions = ">=3.5"
 
-[package.dependencies]
-click = "*"
-colorclass = "*"
-sphinx = "*"
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-devhelp"
+version = "1.0.2"
+description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-htmlhelp"
+version = "1.0.3"
+description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest", "html5lib"]
+
+[[package]]
+name = "sphinxcontrib-jsmath"
+version = "1.0.1"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+test = ["pytest", "flake8", "mypy"]
+
+[[package]]
+name = "sphinxcontrib-qthelp"
+version = "1.0.3"
+description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-serializinghtml"
+version = "1.1.4"
+description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
 
 [[package]]
 name = "toml"
-version = "0.10.1"
+version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "tornado"
-version = "6.0.4"
+version = "6.1"
 description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
 category = "main"
 optional = false
@@ -438,7 +497,7 @@ python-versions = "*"
 
 [[package]]
 name = "urllib3"
-version = "1.25.11"
+version = "1.26.2"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "main"
 optional = false
@@ -462,12 +521,12 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
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 ]
 unicodecsv = [
     {file = "unicodecsv-0.14.1.tar.gz", hash = "sha256:018c08037d48649a0412063ff4eda26eaa81eff1546dbffa51fa5293276ff7fc"},
 ]
 urllib3 = [
-    {file = "urllib3-1.25.11-py2.py3-none-any.whl", hash = "sha256:f5321fbe4bf3fefa0efd0bfe7fb14e90909eb62a48ccda331726b4319897dd5e"},
-    {file = "urllib3-1.25.11.tar.gz", hash = "sha256:8d7eaa5a82a1cac232164990f04874c594c9453ec55eef02eab885aa02fc17a2"},
+    {file = "urllib3-1.26.2-py2.py3-none-any.whl", hash = "sha256:d8ff90d979214d7b4f8ce956e80f4028fc6860e4431f731ea4a8c08f23f99473"},
+    {file = "urllib3-1.26.2.tar.gz", hash = "sha256:19188f96923873c92ccb987120ec4acaa12f0461fa9ce5d3d0772bc965a39e08"},
 ]
 zipp = [
     {file = "zipp-3.4.0-py3-none-any.whl", hash = "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108"},
diff --git a/pyproject.toml b/pyproject.toml
index 598e1ae96c8..dfc40668d19 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,16 +19,19 @@ packages = [
 gro_client = 'groclient.__main__:main'
 
 [tool.poetry.dependencies]
-python = "^3.6"
+python = "^3.6.1"
 numpy = "*"
 requests = "*"
 pandas = "*"
 tornado = "*"
 unicodecsv = "*"
-sphinx = { version = "1.5.6", optional = true }
+# TODO: Sphinx 3.2.0 added support for local link checking w/ -b linkcheck. Our
+# docs currently fail at this though, due to the way we do local linking. See:
+# https://www.sphinx-doc.org/en/master/changes.html
+sphinx = { version = "~3.1.0", optional = true }
 recommonmark = { version = "*", optional = true }
 sphinx_rtd_theme = { version = "*", optional = true }
-sphinxcontrib-versioning = { version = "*", optional = true }
+sphinx-multiversion = { version = "*", optional = true }
 
 [tool.poetry.dev-dependencies]
 mock = "*"
@@ -36,7 +39,7 @@ pytest = "*"
 pytest-cov = "*"
 
 [tool.poetry.extras]
-docs = ["sphinx", "recommonmark", "sphinx_rtd_theme", "sphinxcontrib-versioning"]
+docs = ["sphinx", "recommonmark", "sphinx_rtd_theme", "sphinx-multiversion"]
 
 [build-system]
 requires = ["poetry-core>=1.0.0", "poetry-dynamic-versioning"]
diff --git a/shippable.yml b/shippable.yml
index ee2e559e4a5..04b5ef7f86a 100644
--- a/shippable.yml
+++ b/shippable.yml
@@ -33,19 +33,21 @@ build:
       shippable_retry pip install -r api/client/samples/analogous_years/requirements.txt &&
       poetry run pytest api/client/samples/analogous_years/
   on_success:
-    # Build package.
-    # Note: We need to install versioning library outside of the poetry venv.
-    # See note in CONTRIBUTING.md
-    - >
-      pip install poetry-dynamic-versioning &&
-      poetry build
     # Build docs and push to gh-pages.
+    # Note: git remote set-url is for setting a git url instead of an https
+    # one, which is needed so Shippable can be authenticated to push changes.
     - >
       shippable_retry poetry install -E docs &&
       git config --global user.email "api-documentation@gro-intelligence.com" &&
       git config --global user.name "Gro Intelligence" &&
       git remote set-url origin git@github.com:$REPO_FULL_NAME.git &&
-      ssh-agent bash -c 'ssh-add /tmp/ssh/00_sub; poetry run sphinx-versioning push -r development docs gh-pages .'
+      poetry run bin/sphinx_push_ghpages.sh
+    # Build package.
+    # Note: We need to install versioning library outside of the poetry venv.
+    # See note in CONTRIBUTING.md
+    - >
+      pip install poetry-dynamic-versioning &&
+      poetry build
     # Publish new development updates to TestPyPI whenever changes are merged
     # to development.
     #