diff --git a/scripts/internal_events/cli.rb b/scripts/internal_events/cli.rb
index 01ea1984d10a97675b3b1e4a3414234fd3132a0d..3d570c10a7bbc3376e00737b7200eb47baf8db7e 100755
--- a/scripts/internal_events/cli.rb
+++ b/scripts/internal_events/cli.rb
@@ -7,6 +7,7 @@
 require 'net/http'
 require 'yaml'
 require 'json_schemer'
+require 'delegate'
 
 require_relative './cli/helpers'
 require_relative './cli/usage_viewer'