diff --git a/src/extension.ts b/src/extension.ts
index b334780bcbbdfdedd512498f371d415f9fb2b674..f1a94fe333d818a3ad6d2a7352b7f307ed61255e 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -22,6 +22,7 @@   'erb',
   'handlebars',
   'ejs',
   'nunjucks',
+  'haml',
   // for jsx
   ...JS_TYPES
 ]