diff --git a/lib/sprig/reap/inputs/model.rb b/lib/sprig/reap/inputs/model.rb
index a116c3d..77322dc 100644
--- a/lib/sprig/reap/inputs/model.rb
+++ b/lib/sprig/reap/inputs/model.rb
@@ -5,7 +5,7 @@ class Model
     def self.valid_classes
       @@valid_classes ||= begin
         Rails.application.eager_load!
-        ActiveRecord::Base.subclasses
+        ActiveRecord::Base.descendants.reject &:abstract_class?
       end
     end