diff --git a/src/extension.ts b/src/extension.ts
index e79a732b0b2ff6c84357a2db93f90e85e4e3699b..06f9da6a0a53c66eb8be8dd9290a0a2f1eb4e7bf 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -22,7 +22,8 @@   'erb',
   'handlebars',
   'ejs',
   'nunjucks',
-  'haml'
+  'haml',
+  'leaf'
 ]
 const CSS_TYPES = ['css', 'sass', 'scss', 'less', 'stylus']