diff --git a/.drone.yml b/.drone.yml
index e939958..acaf294 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,9 +6,11 @@ steps:
   - name: epub
     image: python:slim
     commands:
+      - apt-get update
+      - apt-get install -y git
       - pip install flake8 black
       - flake8 --ignore=E501
-      - black --check
+      - black --check .
       - pip install -r requirements.txt
       - python run.py
   - name: pdf