diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a83efa7198e35227f3d1119c669dbd4d07fe3a2d..ca47ac28d6f2cd97f2d9596e889dab90a2ebbe6e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,4 @@
+image: python:3.9-bullseye
 pages:
   stage: deploy
   script: