diff --git a/access.lua b/access.lua
index dd34f32..d4b07c5 100644
--- a/access.lua
+++ b/access.lua
@@ -319,7 +319,7 @@ function serve(uri)
 
     -- Access to directory root: forbidden
     if string.ends(rel_path, "/") then
-        return ngx.exit(403)
+        return ngx.exit(ngx.HTTP_FORBIDDEN)
     end
 
     -- Try to get file content