diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 869f653f802db06ba5e3e7fcabdcbe7a46d42897..1d0a78cd590525830ff5c949ade0d1eaa0c1b9e0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 default:
-  image: python:3-slim
+  image: python:3.9-slim
 variables:
   DOCKER_TLS_CERTDIR: ""
   APP_VERSION: "beta"