diff --git a/Jenkinsfile b/Jenkinsfile
index af1cf4e..77f1ae3 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -108,13 +108,21 @@ pipeline {
                             waitUntil {
                                 sleep(time: 10, unit: 'SECONDS')
 
-                                // Query OPNSense DHCP leases API and parse with jq
+                                // Query OPNSense DHCP leases API and parse with Python
                                 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://${OPNSENSE_HOST}/api/dhcpv4/leases/searchLease" | \
+                                        python3 -c "
+import sys, json
+data = json.load(sys.stdin)
+hostname = '${templateHost}'
+for row in data.get('rows', []):
+    if row.get('hostname') == hostname or row.get('client-hostname') == hostname:
+        print(row.get('address', ''))
+        break
+"
+                                    """,
                                     returnStdout: true
                                 ).trim()