diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5dfbf0642691e4033bac3f82bdc6fcdeff49f878..206bb50cc4a08fd53c59dcfa64c7f44427f2c823 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,7 +20,7 @@ black:
   before_script:
     - pip install black
   script:
-    - black --check --diff api/
+    - black --exclude "/(\.git|\.hg|\.mypy_cache|\.tox|\.venv|_build|buck-out|build|dist|migrations)/" --check --diff api/
 
 flake8:
   image: python:3.6