diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7d35803a7..488816871 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -222,7 +222,7 @@ test:integration:es:
       alias: mysql
     - name: registry.znuny.com/docker/zammad-postgresql:latest
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-elasticsearch:latest
+    - name: registry.znuny.com/docker/zammad-elasticsearch:5.6
       alias: elasticsearch
   variables:
     RAILS_ENV: "test"
@@ -320,7 +320,7 @@ browser:build:
       alias: mysql
     - name: registry.znuny.com/docker/zammad-postgresql:latest
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-elasticsearch:latest
+    - name: registry.znuny.com/docker/zammad-elasticsearch:5.6
       alias: elasticsearch
     - name: docker.io/elgalu/selenium:3.14.0-p17
       alias: selenium