diff --git a/packages/babel-plugin-transform-runtime/README.md b/packages/babel-plugin-transform-runtime/README.md
index 011a3eab10..fb82b38de5 100644
--- a/packages/babel-plugin-transform-runtime/README.md
+++ b/packages/babel-plugin-transform-runtime/README.md
@@ -50,7 +50,7 @@ Without options:
 
 With options:
 
-```json
+```js
 {
   "plugins": [
     ["transform-runtime", {