Update .gitlab-ci.yml
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9d1d347..86614cb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: maven:3.3.9-jdk-8
+image: maven:3.6-jdk-8
 
 #cache:
 #    paths: