--- a/src/pyams_content/shared/common/types.py	Wed Nov 06 16:54:59 2019 +0100
+++ b/src/pyams_content/shared/common/types.py	Tue Nov 19 16:39:10 2019 +0100
@@ -87,7 +87,7 @@
 
 
 @implementer(ITypedSharedTool)
-class TypedSharedTool(SharedTool):
+class TypedSharedToolMixin(object):
     """Typed shared tool"""
 
     shared_content_types_fields = None
@@ -121,7 +121,7 @@
 #
 
 @implementer(IWfTypedSharedContent)
-class WfTypedSharedContent(WfSharedContent):
+class WfTypedSharedContentMixin(object):
     """Typed shared content"""
 
     data_type = FieldProperty(IWfTypedSharedContent['data_type'])