diff --git a/zwave_js/config.json b/zwave_js/config.json
index 44568d3..7a982cc 100644
--- a/zwave_js/config.json
+++ b/zwave_js/config.json
@@ -23,7 +23,7 @@
   },
   "schema": {
     "device": "str",
-    "network_key": "password",
+    "network_key": "match(|[0-9a-fA-F]{32,32})",
     "emulate_hardware": "bool?"
   },
   "image": "homeassistant/{arch}-addon-zwave_js"