diff --git a/README.md b/README.md
index f976720..07ac937 100644
--- a/README.md
+++ b/README.md
@@ -11,5 +11,5 @@ const markedMfm = require('marked-mfm')
 
 marked.use(markedMfm)
 marked.parse('$[x2 beeg text]')
-// <p><span style="display: inline-block" class="x2">beeg text</span></p>
+// <p><span style="display: inline-block" class="_mfm_x2_">beeg text</span></p>
 ```