diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b0712d837d113d851d0a98e4957b68d31050963f..6d7c8aa4ee8e9104ae3567b3692385deeea5d71c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,11 +31,11 @@ cache:
 
 unittest:jdk8:
   <<: *unittest
-  image: maven:3.5.3-jdk-8
+  image: maven:3.6.3-jdk-8
 
 release:
   stage: deploy
-  image: maven:3.5.3-jdk-8
+  image: maven:3.6.3-jdk-8
   tags:
     - olat
   before_script: