diff --git a/lib/event_source/controls/category.rb b/lib/event_source/controls/category.rb
index <HASH>..<HASH> 100644
--- a/lib/event_source/controls/category.rb
+++ b/lib/event_source/controls/category.rb
@@ -13,7 +13,7 @@ module EventSource
         category ||= 'Test'
 
         if randomize_category
-          category = "#{category}#{Identifier::UUID.random.gsub('-', '')}"
+          category = "#{category}#{SecureRandom.hex}"
         end
 
         category
SecureRandom hex achieves the same as UUID with dashes removed for the purposes of this control