diff --git a/docs/content/config/security/ssl.md b/docs/content/config/security/ssl.md
index 8f673b3e..4bc441ba 100644
--- a/docs/content/config/security/ssl.md
+++ b/docs/content/config/security/ssl.md
@@ -209,7 +209,7 @@ Then
 #### Example using docker, nginx-proxy and letsencrypt-nginx-proxy-companion with docker-compose
 The following docker-compose.yml is the basic setup you need for using letsencrypt-nginx-proxy-companion. It is mainly derived from its own wiki/documenation.
 
-```
+```YAML
 version: "2"
 
 services: