diff --git a/.drone.yml b/.drone.yml
index a0177de..d0bae99 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,9 +6,10 @@ steps:
 - name: pytest
   image: python:3.6-alpine3.13
   commands:
-    - wget -O- https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python3 -
-    - source $HOME/.poetry/env && poetry install
-    - source $HOME/.poetry/env && poetry run pytest
+    - apk add --no-cache g++ libffi-dev
+    - wget -O- https://raw.githubusercontent.com/python-poetry/poetry/master/install-poetry.py | python3 -
+    - /root/.local/bin/poetry install
+    - /root/.local/bin/poetry run pytest
 
 - name: docker
   image: plugins/docker