diff --git a/share/apps.json b/share/apps.json
index 6e55be020..b172abeb0 100644
--- a/share/apps.json
+++ b/share/apps.json
@@ -551,7 +551,8 @@
"Contao": {
"website": "contao.org",
"cats": [ 1 ],
- "html": "(?:|]+(?:typolight|contao)\\.css)",
+ "html": {"", "]+(?:typolight|contao)\\.css"},
+ "meta": { "generator": "^Contao Open Source CMS$" },
"implies": "PHP"
},
"Contenido": {