diff --git a/aws-es-proxy.go b/aws-es-proxy.go
index e8b28562..06ae1168 100644
--- a/aws-es-proxy.go
+++ b/aws-es-proxy.go
@@ -422,6 +422,14 @@ func addHeaders(src, dest http.Header) {
 		dest.Add("Kbn-Version", val[0])
 	}
 
+	if val, ok := src["Osd-Version"]; ok {
+		dest.Add("Osd-Version", val[0])
+	}
+
+	if val, ok := src["Osd-Xsrf"]; ok {
+		dest.Add("Osd-Xsrf", val[0])
+	}
+
 	if val, ok := src["Content-Type"]; ok {
 		dest.Add("Content-Type", val[0])
 	}