diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e5be0b74..2f6dd6a4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,20 +1,30 @@
 stages:
   - test
 
-test:
+# Installs and launch unittests
+unittests:
   stage: test
   script:
-  - env
+  # Install dependencies
   - apt-get update
   - apt-get install -y gettext libxapian-dev libgraphviz-dev
   - pip install poetry
-  - poetry install -E testing
+  # Check pyproject.toml validity
+  - poetry check
+  # Install project
+  - poetry install -E testing -E docs
+  # Setup xapian index
   - mkdir -p /dev/shm/search_indexes
   - ln -s /dev/shm/search_indexes sith/search_indexes
+  # Setup project
   - poetry run ./manage.py compilemessages
+  # Run tests and export report
   - poetry run coverage run ./manage.py test
   - poetry run coverage html
   - poetry run coverage report
+  # Build documentation
+  - cd doc
+  - poetry run make html
   variables:
     PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip_tests"
   cache:
@@ -23,11 +33,14 @@ test:
   artifacts:
     paths:
       - coverage_report/
+      - docs/_build
 
+# Check black
 black:
   stage: test
   script:
-    - pip install -U black
+    - version=$(cat pyproject.toml | grep --color=never black | grep --color=never -oE '[0-9]([0-9.a-z]+)')
+    - pip install black==$version
     - black --check .
   variables:
     PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip_black"
diff --git a/pyproject.toml b/pyproject.toml
index 1d642a47..602786e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,8 +38,10 @@ libsass = "^0.21.0"
 django-ordered-model = "^3.4.3"
 django-simple-captcha = "^0.5.14"
 python-dateutil = "^2.8.2"
+psycopg2-binary = "^2.9.1"
 sentry-sdk = "^1.4.3"
 graphviz = "^0.17"
+Jinja2 = "<=3.0.3"
 
 # Extra optional dependencies
 mysqlclient = { version = "^2.0.3", optional = true }