diff --git a/docs/content/middlewares/redirectscheme.md b/docs/content/middlewares/redirectscheme.md
index 144007563..8fd2c5e39 100644
--- a/docs/content/middlewares/redirectscheme.md
+++ b/docs/content/middlewares/redirectscheme.md
@@ -208,7 +208,7 @@ metadata:
 spec:
   redirectScheme:
     # ...
-    port: 443
+    port: "443"
 ```
 
 ```yaml tab="Consul Catalog"
@@ -247,5 +247,7 @@ http:
     test-redirectscheme:
       redirectScheme:
         # ...
-        port: 443
+        port: "443"
 ```
+
+!!! info "Port in this configuration is a string, not a numeric value."