diff --git a/horizon/values.yaml b/horizon/values.yaml
index 7a66e051bb..0190050e8b 100644
--- a/horizon/values.yaml
+++ b/horizon/values.yaml
@@ -69,6 +69,7 @@ conf:
       conf_dir: /etc/apache2/conf-available
       mods_dir: /etc/apache2/mods-available
       a2enmod:
+        - headers
         - rewrite
       a2dismod:
         - status