diff --git a/novnc.yml b/novnc.yml
index 3fa94d2..3c6a64c 100644
--- a/novnc.yml
+++ b/novnc.yml
@@ -61,8 +61,7 @@
                 entryPoints:
                   - "https"
                 tls:
-                  certresolver:
-                    - "letsencrypt"
+                  certresolver: letsencrypt
                 middlewares: 
                   - "secHeaders@file"
                   - "auth-novnc"