diff --git a/src/theme.scss b/src/theme.scss
index c8b0d59ec..fd02f8bfd 100644
--- a/src/theme.scss
+++ b/src/theme.scss
@@ -1931,6 +1931,10 @@ tag-input {
         background-color: $backgroundDark;
     }
 
+    .btn[disabled] {
+        opacity: 0.25;
+    }
+
     .btn-default {
         color: $textColor;