diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 965c89c..eaadace 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,7 +4,7 @@ stages:
 
 buiild job:
   stage: build
-  image: debian:jessie
+  image: python:3-buster
   script:
     - export PYTHONPATH=.
     - export FLASK_APP=period