diff --git a/inst/lib/bsw4/dist/yeti/_bootswatch.scss b/inst/lib/bsw4/dist/yeti/_bootswatch.scss
index 65f09bd..4e746f6 100644
--- a/inst/lib/bsw4/dist/yeti/_bootswatch.scss
+++ b/inst/lib/bsw4/dist/yeti/_bootswatch.scss
@@ -81,6 +81,10 @@ $web-font-path: "https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,
     border-color: darken($secondary, 5%);
   }
 
+  &-default {
+    border-color: darken($secondary, 5%);
+  }
+
   &-success {
     border-color: darken($success, 5%);
   }