diff --git a/auquotidien/modules/clicrdv.py b/auquotidien/modules/clicrdv.py
index b7636f8..e5647fa 100644
--- a/auquotidien/modules/clicrdv.py
+++ b/auquotidien/modules/clicrdv.py
@@ -1,8 +1,11 @@
-class AppointmentPart(object):
+from wcs.workflows import EvolutionPart
+
+
+class AppointmentPart(EvolutionPart):
     def view(self):
         return ''
 
 
-class AppointmentErrorPart(object):
+class AppointmentErrorPart(EvolutionPart):
     def view(self):
         return ''