diff --git a/runtime/syntax/nginx.yaml b/runtime/syntax/nginx.yaml
index 02ea6eb0..af4598bc 100644
--- a/runtime/syntax/nginx.yaml
+++ b/runtime/syntax/nginx.yaml
@@ -1,7 +1,7 @@
 filetype: nginx
 
 detect:
-    filename: "nginx.*\\.conf$|\\.nginx$"
+    filename: "nginx.*\\.conf$|\\.nginx$|\\.sub(domain|folder)\\.conf$"
     header: "^(server|upstream)[a-z ]*\\{$"
 
 rules: