diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index d9c7bf09..e04eb797 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -79,7 +79,8 @@ First time setup
 
         pip install -e ".[dev]"
 
-- Install the pre-commit hooks:
+- Install the `pre-commit framework`_.
+- Install the pre-commit hooks::
 
         pre-commit install --install-hooks
 
@@ -89,6 +90,7 @@ First time setup
 .. _email: https://help.github.com/en/articles/setting-your-commit-email-address-in-git
 .. _Fork: https://github.com/pallets/flask/fork
 .. _Clone: https://help.github.com/en/articles/fork-a-repo#step-2-create-a-local-clone-of-your-fork
+.. _pre-commit framework: https://pre-commit.com/#install
 
 Start coding
 ~~~~~~~~~~~~
diff --git a/docs/Makefile b/docs/Makefile
index 51285967..d4bb2cbb 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,9 +1,10 @@
 # Minimal makefile for Sphinx documentation
 #
 
-# You can set these variables from the command line.
-SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build
 
diff --git a/docs/conf.py b/docs/conf.py
index 2bcda5af..39e56a8f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,4 +1,4 @@
-import packaging
+import packaging.version
 from pallets_sphinx_themes import get_version
 from pallets_sphinx_themes import ProjectLink
 
diff --git a/docs/make.bat b/docs/make.bat
index 7893348a..922152e9 100644
--- a/docs/make.bat
+++ b/docs/make.bat
@@ -25,11 +25,11 @@ if errorlevel 9009 (
 	exit /b 1
 )
 
-%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
 goto end
 
 :help
-%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
 
 :end
 popd
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 543ec917..b8e76e45 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,5 @@
-Sphinx~=2.1.2
-Pallets-Sphinx-Themes~=1.1.4
-sphinxcontrib-log-cabinet~=1.0.0
+Sphinx~=2.2.0
+Pallets-Sphinx-Themes~=1.2.2
+sphinxcontrib-log-cabinet~=1.0.1
 sphinx-issues~=1.2.0
+packaging~=19.2