diff --git a/addon/modifiers/clipboard.js b/addon/modifiers/clipboard.js
index 15d3863..9f31e3e 100644
--- a/addon/modifiers/clipboard.js
+++ b/addon/modifiers/clipboard.js
@@ -1,12 +1,15 @@
 import { modifier } from 'ember-modifier';
 import ClipboardJS from 'clipboard';
 import { isBlank } from '@ember/utils';
-import { capitalize } from '@ember/string';
 import { guidFor } from '@ember/object/internals';
 import { macroCondition, dependencySatisfies } from '@embroider/macros';
 
 const CLIPBOARD_EVENTS = ['success', 'error'];
 
+function capitalize(string) {
+  return string.charAt(0).toUpperCase() + string.slice(1);
+}
+
 function clipboard(element, params, hash) {
   const {
     action = 'copy',