diff --git a/doc/docker/varnish.yml b/doc/docker/varnish.yml
index 1c66ae32a1..72a6eb31b9 100644
--- a/doc/docker/varnish.yml
+++ b/doc/docker/varnish.yml
@@ -11,7 +11,7 @@ services:
      - SYMFONY_HTTP_CACHE=0
      - SYMFONY_TRUSTED_PROXIES=varnish
      - HTTPCACHE_PURGE_SERVER=http://varnish
-     - HTTPCACHE_PURGE_TYPE=http
+     - HTTPCACHE_PURGE_TYPE=varnish
 
   varnish:
     build: