diff --git a/caddyhttp/httpserver/plugin.go b/caddyhttp/httpserver/plugin.go
index 1508b41ec..16d858b8d 100644
--- a/caddyhttp/httpserver/plugin.go
+++ b/caddyhttp/httpserver/plugin.go
@@ -551,6 +551,7 @@ var directives = []string{
 	"startup",  // TODO: Deprecate this directive
 	"shutdown", // TODO: Deprecate this directive
 	"on",
+	"supervisor", // github.com/lucaslorentz/caddy-supervisor
 	"request_id",
 	"realip", // github.com/captncraig/caddy-realip
 	"git",    // github.com/abiosoft/caddy-git