diff --git a/plugin_common/plugin_manager.py b/plugin_common/plugin_manager.py
index a1803f6..c085b4e 100644
--- a/plugin_common/plugin_manager.py
+++ b/plugin_common/plugin_manager.py
@@ -107,10 +107,9 @@ class PluginManager:
             plugin_class = None
             for name, obj in inspect.getmembers(module):
                 if (inspect.isclass(obj) and
-                        issubclass(obj, PluginInterface) and
+                        (issubclass(obj, PluginInterface) or issubclass(obj, MessagePluginInterface)) and 
                         obj != PluginInterface and
-                        obj != MessagePluginInterface and
-                        obj != ScheduledPluginInterface):
+                        obj != MessagePluginInterface):
                     plugin_class = obj
                     break