README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index f863b59..62b9a5e 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,17 @@ When using IIS, you must [disable its buffering](https://support.microsoft.com/e
 When using Varnish, the following VCL disables buffering only for BigPipe responses:
 
 ```
+vcl_backend_response {
+  if (beresp.Surrogate-Control ~ "BigPipe/1.0") {
+    set beresp.do_stream = true;
+    set beresp.ttl = 0s;
+  }
+}
+```
+
+and for Varnish <4:
+
+```
 vcl_fetch {
   if (beresp.Surrogate-Control ~ "BigPipe/1.0") {
     set beresp.do_stream = true;