diff --git a/core/themes/classy/classy.libraries.yml b/core/themes/classy/classy.libraries.yml
index f970f86..c1445d7 100644
--- a/core/themes/classy/classy.libraries.yml
+++ b/core/themes/classy/classy.libraries.yml
@@ -17,6 +17,7 @@ base:
       css/components/link.css: { weight: -10 }
       css/components/links.css: { weight: -10 }
       css/components/menu.css: { weight: -10 }
+      css/components/messages.css: { weight: -10 }
       css/components/more-link.css: { weight: -10 }
       css/components/pager.css: { weight: -10 }
       css/components/tabledrag.css: { weight: -10 }