diff --git a/debian/control b/debian/control
index c52ceb50..68c0d14e 100644
--- a/debian/control
+++ b/debian/control
@@ -13,6 +13,7 @@ Depends: ${misc:Depends}, ${python:Depends},
     python-gadjo,
     python-requests
 Recommends: python-django-mellon
+Breaks: chrono (<<0.84.post3+g14d5615)
 Description: Agendas System (Python module)
 
 Package: chrono
@@ -29,4 +30,6 @@ Depends: ${misc:Depends},
     uwsgi-plugin-python
 Recommends: nginx
 Suggests: postgresql
+Breaks: python-chrono (<<0.84.post3+g14d5615)
+Replaces: python-chrono (<<0.84.post3+g14d5615)
 Description: Agendas System