diff --git a/manifest.toml b/manifest.toml
index c08ac6f..80f42fa 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -101,5 +101,10 @@ ram.runtime = "50M" # FIXME: replace with an **estimate** minimum ram requiremen
         "mariadb-server",
     ]
 
+    [resources.apt.extras.yarn]
+    repo = "deb https://dl.yarnpkg.com/debian/ stable main"
+    key = "https://dl.yarnpkg.com/debian/pubkey.gpg"
+    packages = "yarn"
+
     [resources.database]
     type = "mysql"