diff --git a/src/en/docs/installation-reverse-proxies.md b/src/en/docs/installation-reverse-proxies.md
index 0eed7e3..6cf0dce 100644
--- a/src/en/docs/installation-reverse-proxies.md
+++ b/src/en/docs/installation-reverse-proxies.md
@@ -18,7 +18,7 @@ Assumptions made in this config:
 
 If you enable these labels, remove the ports section
 
-```YML
+```YAML
 photoview:
   ...
   labels: