diff --git a/core/themes/classy/classy.info.yml b/core/themes/classy/classy.info.yml
index bd61ce0..c63422a 100644
--- a/core/themes/classy/classy.info.yml
+++ b/core/themes/classy/classy.info.yml
@@ -8,3 +8,6 @@ core: 8.x
 libraries:
   - classy/base
   - core/normalize
+  - classy/action-links
+  - classy/breadcrumb
+  - classy/button
diff --git a/core/themes/classy/classy.libraries.yml b/core/themes/classy/classy.libraries.yml
index 1682b79..374f8dc 100644
--- a/core/themes/classy/classy.libraries.yml
+++ b/core/themes/classy/classy.libraries.yml
@@ -32,16 +32,16 @@ action-links:
   version: VERSION
   css:
     theme:
-      css/components/action-links.theme.css: {}
+      css/components/action-links.css: {}
 
 breadcrumb:
   version: VERSION
   css:
     theme:
-      css/components/breadcrumb.theme.css: {}
+      css/components/breadcrumb.css: {}
 
 button:
   version: VERSION
   css:
     theme:
-      css/components/button.theme.css: {}
+      css/components/button.css: {}
diff --git a/core/themes/classy/css/components/action-links.theme.css b/core/themes/classy/css/components/action-links.css
similarity index 100%
rename from core/themes/classy/css/components/action-links.theme.css
rename to core/themes/classy/css/components/action-links.css
diff --git a/core/themes/classy/css/components/breadcrumb.theme.css b/core/themes/classy/css/components/breadcrumb.css
similarity index 100%
rename from core/themes/classy/css/components/breadcrumb.theme.css
rename to core/themes/classy/css/components/breadcrumb.css
diff --git a/core/themes/classy/css/components/button.theme.css b/core/themes/classy/css/components/button.css
similarity index 100%
rename from core/themes/classy/css/components/button.theme.css
rename to core/themes/classy/css/components/button.css
diff --git a/core/themes/classy/templates/navigation/breadcrumb.html.twig b/core/themes/classy/templates/navigation/breadcrumb.html.twig
index ca1360a..7dc08c5 100644
--- a/core/themes/classy/templates/navigation/breadcrumb.html.twig
+++ b/core/themes/classy/templates/navigation/breadcrumb.html.twig
@@ -7,7 +7,6 @@
  * - breadcrumb: Breadcrumb trail items.
  */
 #}
-{{ attach_library('classy/breadcrumb') }}
 {% if breadcrumb %}
   <nav class="breadcrumb" role="navigation" aria-labelledby="system-breadcrumb">
     <h2 id="system-breadcrumb" class="visually-hidden">{{ 'Breadcrumb'|t }}</h2>