diff --git a/README.md b/README.md
index caca6fc..a923f67 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ batchAsync(batchSize, things, doStuff).then(function(results) {
 });
 ```
 
-## A note on 'undefined'
+## A note on `undefined`
 
 Returning `undefined` will cause an exception to be thrown,
 and the Promise to be rejected.