diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 05530a0..4587194 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,6 @@ variables:
   GITLAB_CI_IMAGE_PYTHON: 'python:3'
   GITLAB_CI_PYPI_DOCKER_COMPOSE: 'docker-compose~=1.23.0'
   GITLAB_CI_PYPI_TOX: 'tox~=3.8.0'
-  GITLAB_CI_PYPI_SPHINX_RTD_THEME: 'sphinx_rtd_theme~=0.4.0'
 stages:
   - static
   - build
@@ -34,10 +33,10 @@ docs:
   stage: build
   image: ${GITLAB_CI_IMAGE_PYTHON}
   before_script:
-    - pip install "$GITLAB_CI_PYPI_SPHINX_RTD_THEME"
+    - pip install "$GITLAB_CI_PYPI_TOX"
   script:
-    - cd docs
-    - make html SPHINXOPTS="-W"
+    - rm -rf docs/_build
+    - tox -e "docs"
   artifacts:
     expire_in: 1 week
     when: always
diff --git a/tox.ini b/tox.ini
index d7cb9fc..9de99dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8,isort,yapf,pylint,build
+envlist = flake8,isort,yapf,pylint,build,docs
 
 [depversions]
 flake8 = 3.7.7
@@ -7,6 +7,7 @@ isort = 4.3.17
 yapf = 0.27.0
 pylint = 2.3.1
 pylint_django = 2.0.9
+sphinx_rtd_theme = 0.4.3
 
 [testenv:flake8]
 deps =
@@ -36,11 +37,6 @@ deps =
 skip_install = True
 commands = yapf -i -r .
 
-[testenv:build]
-skip_install = True
-commands =
-    python setup.py sdist bdist_wheel
-
 [testenv:pylint]
 deps =
     pylint=={[depversions]pylint}
@@ -50,6 +46,18 @@ commands = pylint \
     {envsitepackagesdir}/db \
     {envsitepackagesdir}/auth0login
 
+[testenv:build]
+skip_install = True
+commands =
+    python setup.py sdist bdist_wheel
+
+[testenv:docs]
+deps =
+    sphinx_rtd_theme=={[depversions]sphinx_rtd_theme}
+changedir = {toxinidir}/docs
+commands =
+    sphinx-build -b html . "_build/html"
+
 [testenv:deps]
 install_command = python -m pip install --no-deps {opts} {packages}
 recreate = True