diff --git a/prometheus_node_exporter/config.json b/prometheus_node_exporter/config.json
index 134475a..2c7856c 100644
--- a/prometheus_node_exporter/config.json
+++ b/prometheus_node_exporter/config.json
@@ -10,7 +10,7 @@
   "init": false,
   "webui": "[PROTO:enable_tls]://[HOST]:[PORT:9100]",
   "ports": {
-    "9100/tcp": 9100
+    "9100/tcp": null
   },
   "ports_description": {
     "9100/tcp": "Default node exporter port and web interface"