diff --git a/Jenkinsfile b/Jenkinsfile
index da075b4..af1cf4e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -110,11 +110,11 @@ pipeline {
 
                                 // Query OPNSense DHCP leases API and parse with jq
                                 vmIp = sh(
-                                    script: """
-                                        curl -s -k -u "\${OPNSENSE_KEY}:\${OPNSENSE_SECRET}" \
-                                            "https://${OPNSENSE_HOST}/api/dhcpv4/leases/searchLease" | \
-                                        jq -r '.rows[] | select(.hostname == "${templateHost}" or .["client-hostname"] == "${templateHost}") | .address' | head -1
-                                    """,
+                                    script: '''
+                                        curl -s -k -u "${OPNSENSE_KEY}:${OPNSENSE_SECRET}" \
+                                            "https://''' + OPNSENSE_HOST + '''/api/dhcpv4/leases/searchLease" | \
+                                        jq -r '.rows[] | select(.hostname == "''' + templateHost + '''" or .["client-hostname"] == "''' + templateHost + '''") | .address' | head -1
+                                    ''',
                                     returnStdout: true
                                 ).trim()