diff --git a/internal/proxy/reverse.go b/internal/proxy/reverse.go
index c210c1b..f140f80 100644
--- a/internal/proxy/reverse.go
+++ b/internal/proxy/reverse.go
@@ -21,6 +21,8 @@ func NewReverseProxy(target *url.URL, stripPrefix, pathPrefix string, setAuth st
 			if setAuth != "" {
 				req.Header.Set("Authorization", setAuth)
 			}
+			// Server-side requests carry RequestURI; client RoundTrip rejects it with URL.Host set.
+			req.RequestURI = ""
 			return
 		}
 		rest := strings.TrimPrefix(p, stripPrefix)
@@ -41,6 +43,7 @@ func NewReverseProxy(target *url.URL, stripPrefix, pathPrefix string, setAuth st
 		if setAuth != "" {
 			req.Header.Set("Authorization", setAuth)
 		}
+		req.RequestURI = ""
 	}
 	return proxy
 }