diff --git a/pkg/op/server.go b/pkg/op/server.go
index 829618c..e2ecdad 100644
--- a/pkg/op/server.go
+++ b/pkg/op/server.go
@@ -246,7 +246,9 @@ func NewRedirect(url string) *Redirect {
 }
 
 func (red *Redirect) writeOut(w http.ResponseWriter, r *http.Request) {
-	gu.MapMerge(r.Header, w.Header())
+	writerHeader := w.Header()
+	gu.MapMerge(red.Header, writerHeader)
+	writerHeader.Set("Content-Length", "0")
 	http.Redirect(w, r, red.URL, http.StatusFound)
 }