diff --git a/config/postcss.config.js b/config/postcss.config.js
index f9d1a18..3ab38a9 100644
--- a/config/postcss.config.js
+++ b/config/postcss.config.js
@@ -22,6 +22,7 @@ module.exports = {
         'alert-link',
         'container-xxl',
         'container-fluid',
+        'offcanvas-backdrop',
         ...whitelister([
           './assets/scss/components/_alerts.scss',
           './assets/scss/components/_buttons.scss',