diff --git a/deploy/jenkins/Jenkinsfile.poll b/deploy/jenkins/Jenkinsfile.poll
index ee164d4..9efabcc 100644
--- a/deploy/jenkins/Jenkinsfile.poll
+++ b/deploy/jenkins/Jenkinsfile.poll
@@ -99,9 +99,10 @@ pipeline {
                             def harborListUrl = "${HARBOR_API}/projects/${params.HARBOR_PROJECT}/repositories?page_size=100"
                             def services = sh(
                                 script: """
+                                    HARBOR_LIST_URL="${harborListUrl}"
                                     curl -s -u "\${HARBOR_USER}:\${HARBOR_PASS}" \\
                                         --connect-timeout 10 --max-time 30 \\
-                                        '${harborListUrl}' \\
+                                        "\${HARBOR_LIST_URL}" \\
                                     | python3 -c '
 import sys, json
 repos = json.load(sys.stdin)