diff --git a/website/docs/deploy/docker_install_advanced.md b/website/docs/deploy/docker_install_advanced.md
index 502b2195..f34c1370 100644
--- a/website/docs/deploy/docker_install_advanced.md
+++ b/website/docs/deploy/docker_install_advanced.md
@@ -108,7 +108,7 @@ If a sensor is not referenced at all, all of its flows will be kept.
 
 For example,
 
-```
+```sh
 subnet_filter_flag=True
 subnet_filter_keep=Sensor A Name: 123.45.6.0/16; Sensor B Name: 123.33.33.0/24, 456.66.66.0/24
 ```