diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1744e2fb511593e82ae1c5ecdba364998cfc4d2a..b23abd010e0321c9862b27c95f9cca6c9a0c753e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,7 @@ stages:
 
 variables:
   DOCKER_IMAGE: "registry.duniter.org/docker/python3/poetry"
-  PYTHON_VERSION: "3.5"
+  PYTHON_VERSION: "3.8"
 
 image: $DOCKER_IMAGE/$PYTHON_VERSION:latest
 
@@ -45,7 +45,6 @@ format:
   extends:
     - .changes
   stage: format
-  image: $DOCKER_IMAGE/3.8:latest
   script:
     - make check-format