diff --git a/engine/lib/coplan.rb b/engine/lib/coplan.rb
index a8a7f62..c61b165 100644
--- a/engine/lib/coplan.rb
+++ b/engine/lib/coplan.rb
@@ -1,5 +1,6 @@
 require "commonmarker"
 require "diffy"
+require "openai"
 require "coplan/configuration"
 require "coplan/analytics"
 require "coplan/engine"