diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 691d723..fe9d335 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,18 +1,26 @@
 ---
 image: debian:buster
 
+stages:
+- test
+- codestyle
+
 test:
+  stage: test
   script:
   - apt-get update -qy
   - apt-get install -y --no-install-recommends python3-dev python3-pip python3-coverage python3-setuptools build-essential
+  - pip3 install wheel
   - pip3 install -r requirements.txt
   - python3-coverage run --branch -m unittest discover matemat
   - python3-coverage report -m --include 'matemat/*' --omit '*/test_*.py'
 
 codestyle:
+  stage: codestyle
   script:
   - apt-get update -qy
   - apt-get install -y --no-install-recommends python3-dev python3-pip python3-coverage python3-setuptools build-essential
+  - pip3 install wheel pycodestyle mypy
   - pip3 install -r requirements.txt
-  - pip3 install pycodestyle
   - pycodestyle matemat
+  - mypy matemat
diff --git a/requirements.txt b/requirements.txt
index 4564678..f2fa21b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
-wheel
 bcrypt
 apsw