diff --git a/Jenkinsfile b/Jenkinsfile
index 90b788ec8..3563bedd8 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -110,10 +110,10 @@ pipeline {
                         CREDENTIALS = credentials('docker-registry')
                         COMPOSE_PROJECT = "${PROJECT_NAME}-${env.BUILD_ID}"
                         COMPOSE_PARAMS = "-p ${env.COMPOSE_PROJECT} -f test/cypress/docker-compose.yml --project-directory ."
-                        COMPOSE_TAG = PROTECTED_BRANCH.contains(env.CHANGE_TARGET) ? env.CHANGE_TARGET : "dev"
                     }
                     steps {
                         script {
+                            COMPOSE_TAG = PROTECTED_BRANCH.contains(env.CHANGE_TARGET) ? env.CHANGE_TARGET : 'dev'
                             def image = docker.build('lilium-dev', '-f docs/Dockerfile.dev docs')
                             sh "docker-compose ${env.COMPOSE_PARAMS} up -d"
                             image.inside("--network ${env.COMPOSE_PROJECT}_default -e CI -e TZ") {