diff --git a/lib/ulid/rails.rb b/lib/ulid/rails.rb
index ac031a1..098b2d0 100644
--- a/lib/ulid/rails.rb
+++ b/lib/ulid/rails.rb
@@ -1,4 +1,5 @@
 require "active_record"
+require "active_record/fixtures"
 require "active_support/concern"
 require "active_model/type"
 require "ulid"