diff --git a/db/migrate/create_outboxer_signals.rb b/db/migrate/create_outboxer_signals.rb
index 4d16aa7..747d475 100644
--- a/db/migrate/create_outboxer_signals.rb
+++ b/db/migrate/create_outboxer_signals.rb
@@ -5,7 +5,7 @@ def up
         t.string :name, limit: 9, null: false
         t.references :publisher, foreign_key: { to_table: :outboxer_publishers }, null: false
 
-        t.timestamps
+        t.datetime :created_at, null: false
       end
     end
   end