diff --git a/docs/configuration.md b/docs/configuration.md
index 4a3f74827..3944240a2 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -24,6 +24,16 @@ JSON:
 }
 ```
 
+JS:
+
+```js
+// .prettierrc.js
+module.exports = {
+  printWidth: 100,
+  parser: "flow"
+};
+```
+
 YAML:
 
 ```yaml