diff --git a/lib/public_activity/orm/active_record/activity.rb b/lib/public_activity/orm/active_record/activity.rb
index 1f474a2..d58ded5 100644
--- a/lib/public_activity/orm/active_record/activity.rb
+++ b/lib/public_activity/orm/active_record/activity.rb
@@ -47,7 +47,7 @@ class Activity < ::ActiveRecord::Base
         # Serialize parameters Hash
         begin
           if table_exists?
-            serialize :parameters, Hash unless [:json, :jsonb, :hstore].include?(columns_hash['parameters'].type)
+            serialize :parameters, type: Hash, coder: YAML unless [:json, :jsonb, :hstore].include?(columns_hash['parameters'].type)
           else
             warn("[WARN] table #{name} doesn't exist. Skipping PublicActivity::Activity#parameters's serialization")
           end