diff --git a/src/dns-challenge-schema.json b/src/dns-challenge-schema.json
index 7dc59df..69c1d6d 100644
--- a/src/dns-challenge-schema.json
+++ b/src/dns-challenge-schema.json
@@ -10,7 +10,7 @@
             "description" : "The subdomain you got from acme-dns registration",
             "type" : "string"
          },
-         "ACMEDNS_UPDATE_URL" : {
+         "ACMEDNS_BASE_URL" : {
             "description" : "The API update endpoint",
             "type" : "string"
          },