diff --git a/config/importmap.rb b/config/importmap.rb
--- a/config/importmap.rb
+++ b/config/importmap.rb
@@ -55,3 +55,4 @@
 pin "custom", to: "custom.js"
 
 #pin "ace-rails-ap"
+pin "chart", to: 'chart.js' # @3.9.1