diff --git a/webmin.yml b/webmin.yml
index 4a8744b..9e290c7 100644
--- a/webmin.yml
+++ b/webmin.yml
@@ -113,8 +113,7 @@
                 entryPoints:
                   - "https"
                 tls:
-                  certresolver:
-                    - "letsencrypt"
+                  certresolver: letsencrypt
                 middlewares: secHeaders@file
             services:
               webmin: