diff --git a/src/util/Collection.js b/src/util/Collection.js
index 4195fc8a9..6fdffc943 100644
--- a/src/util/Collection.js
+++ b/src/util/Collection.js
@@ -41,7 +41,7 @@ class Collection extends Map {
   /**
    * Creates an ordered array of the values of this collection, and caches it internally. The array will only be
    * reconstructed if an item is added to or removed from the collection, or if you change the length of the array
-   * itself. If you don't want this caching behaviour, use `[...collection.values()]` or
+   * itself. If you don't want this caching behavior, use `[...collection.values()]` or
    * `Array.from(collection.values())` instead.
    * @returns {Array}
    */
@@ -53,7 +53,7 @@ class Collection extends Map {
   /**
    * Creates an ordered array of the keys of this collection, and caches it internally. The array will only be
    * reconstructed if an item is added to or removed from the collection, or if you change the length of the array
-   * itself. If you don't want this caching behaviour, use `[...collection.keys()]` or
+   * itself. If you don't want this caching behavior, use `[...collection.keys()]` or
    * `Array.from(collection.keys())` instead.
    * @returns {Array}
    */