diff --git a/lib/rackstash/fields/abstract_collection.rb b/lib/rackstash/fields/abstract_collection.rb
index b2cbd48..6d7d856 100644
--- a/lib/rackstash/fields/abstract_collection.rb
+++ b/lib/rackstash/fields/abstract_collection.rb
@@ -7,7 +7,6 @@
 
 require 'bigdecimal'
 require 'complex'
-require 'rational'
 require 'pathname'
 require 'uri'