diff --git a/src/scss/theme/classic/layout.scss b/src/scss/theme/classic/layout.scss
index 13fd2a32..d63e1d21 100644
--- a/src/scss/theme/classic/layout.scss
+++ b/src/scss/theme/classic/layout.scss
@@ -15,6 +15,7 @@
   .select2-search--inline {
     .select2-search__field {
       outline: 0;
+      box-shadow: none;
     }
   }