diff --git a/extensions/html/package.json b/extensions/html/package.json
index 18e5fce430d..fcb7f6f6181 100644
--- a/extensions/html/package.json
+++ b/extensions/html/package.json
@@ -33,6 +33,8 @@
           ".asp",
           ".aspx",
           ".jshtm",
+          ".phtml",
+          ".volt",
           ".vue"
         ],
         "aliases": [