diff --git a/.drone.yml b/.drone.yml
index 2693182380..0a96385150 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,7 +3,7 @@ type: docker
 name: default
 steps:
   - name: build
-    image: python-3.9
+    image: python:3.9-slim
     commands:
       - pip install -r requirements/ci.txt
       - pylint ultron --errors-only