diff -u b/core/themes/bartik/bartik.libraries.yml b/core/themes/bartik/bartik.libraries.yml
--- b/core/themes/bartik/bartik.libraries.yml
+++ b/core/themes/bartik/bartik.libraries.yml
@@ -6,8 +6,8 @@
       css/base/typography.css: {}
       css/layout.css: {}
       css/components/admin.css: {}
+      css/components/block.css: {}
       css/components/book.css: {}
-      css/components/block.css {}
       css/components/breadcrumb.css: {}
       css/components/captions.css: {}
       css/components/comments.css: {}