# Porting an existing module that uses the old interface

In order to port a module that uses Synapse's old module interface, its author needs to:

- ensure the module's callbacks are all asynchronous.
- register their callbacks using one or more of the `register_[...]_callbacks` methods from the `ModuleApi` class in the module's `__init__` method (see this section for more info).

Additionally, if the module is packaged with an additional web resource, the module should register this resource in its `__init__` method using the `register_web_resource` method from the `ModuleApi` class (see this section for more info).

The module's author should also update any example in the module's configuration to only use the new `modules` section in Synapse's configuration file (see this section for more info).