diff --git a/engine/config/importmap.rb b/engine/config/importmap.rb
index a548414..e7422b0 100644
--- a/engine/config/importmap.rb
+++ b/engine/config/importmap.rb
@@ -1 +1,2 @@
+pin "@rails/actioncable", to: "actioncable.esm.js"
 pin_all_from CoPlan::Engine.root.join("app/javascript/controllers/coplan"), under: "controllers/coplan", preload: true