diff --git a/docs/content/middlewares/errorpages.md b/docs/content/middlewares/errorpages.md
index 86b095ee0..eaf460ca1 100644
--- a/docs/content/middlewares/errorpages.md
+++ b/docs/content/middlewares/errorpages.md
@@ -28,7 +28,7 @@ metadata:
 spec:
   errors:
     status:
-      - 500-599
+      - "500-599"
     query: /{status}.html
     service:
       name: whoami