diff --git a/src/js/tempusdominus-bootstrap-4.js b/src/js/tempusdominus-bootstrap-4.js
index 641168c..3339ae3 100644
--- a/src/js/tempusdominus-bootstrap-4.js
+++ b/src/js/tempusdominus-bootstrap-4.js
@@ -15,6 +15,7 @@ const TempusDominusBootstrap4 = ($ => { // eslint-disable-line no-unused-vars
                 selector = $element.attr('href') || '';
                 selector = /^#[a-z]/i.test(selector) ? selector : null;
             }
+            selector = selector.replace("[", "\\[").replace("]", "\\]");
             $selector = $(selector);
             if ($selector.length === 0) {
                 return $element;