diff --git a/config/application.rb b/config/application.rb
index 75f4423..910d5f9 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -20,6 +20,8 @@ module CDN
     # Common ones are `templates`, `generators`, or `middleware`, for example.
     config.autoload_lib(ignore: %w[assets tasks])
 
+    config.active_storage.urls_expire_in = 1.month
+
     config.active_record.encryption.primary_key = ENV["ACTIVE_RECORD_ENCRYPTION_PRIMARY_KEY"]
     config.active_record.encryption.deterministic_key = ENV["ACTIVE_RECORD_ENCRYPTION_DETERMINISTIC_KEY"]
     config.active_record.encryption.key_derivation_salt = ENV["ACTIVE_RECORD_ENCRYPTION_KEY_DERIVATION_SALT"]