diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index 57d8d6d..7d1dd96 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -664,14 +664,16 @@ jquery.ui.widget:
 matchmedia:
   remote: https://github.com/paulirish/matchMedia.js
   # @todo Stable release required for Drupal 8.0.
-  version: VERSION
+  version: master
+  commit: 3c67d9bfb525b1b0549448aa27769a289ba5be98
   js:
     assets/vendor/matchMedia/matchMedia.js: {}
 
 matchmedia.addListener:
   remote: https://github.com/paulirish/matchMedia.js
   # @todo Stable release required for Drupal 8.0.
-  version: VERSION
+  version: master
+  commit: 3c67d9bfb525b1b0549448aa27769a289ba5be98
   js:
     assets/vendor/matchMedia/matchMedia.addListener.js: {}
   dependencies:
diff --git a/core/modules/toolbar/toolbar.libraries.yml b/core/modules/toolbar/toolbar.libraries.yml
index e21e9c6..b18450f 100644
--- a/core/modules/toolbar/toolbar.libraries.yml
+++ b/core/modules/toolbar/toolbar.libraries.yml
@@ -24,6 +24,7 @@ toolbar:
     - core/drupalSettings
     - core/drupal.announce
     - core/backbone
+    - core/matchmedia
     - core/matchmedia.addListener
     - core/jquery.once
     - core/drupal.displace