diff --git a/extensions/markdown-basics/package.json b/extensions/markdown-basics/package.json
index 18466e39390..281443efc24 100644
--- a/extensions/markdown-basics/package.json
+++ b/extensions/markdown-basics/package.json
@@ -66,6 +66,7 @@
           "meta.embedded.block.pug": "jade",
           "meta.embedded.block.javascript": "javascript",
           "meta.embedded.block.json": "json",
+          "meta.embedded.block.jsonc": "jsonc",
           "meta.embedded.block.less": "less",
           "meta.embedded.block.objc": "objc",
           "meta.embedded.block.scss": "scss",