diff --git a/packages/tailwindcss-language-service/src/util/languages.ts b/packages/tailwindcss-language-service/src/util/languages.ts
index a441ebd..84d2ddf 100644
--- a/packages/tailwindcss-language-service/src/util/languages.ts
+++ b/packages/tailwindcss-language-service/src/util/languages.ts
@@ -29,6 +29,7 @@ export const htmlLanguages = [
   'php',
   'razor',
   'slim',
+  'surface',
   'twig',
 ]