diff --git a/project_working_time_task_portal/__manifest__.py b/project_working_time_task_portal/__manifest__.py
index a03a72b..fbd8725 100644
--- a/project_working_time_task_portal/__manifest__.py
+++ b/project_working_time_task_portal/__manifest__.py
@@ -3,7 +3,7 @@
 
 {
     "name": "project_working_time_task_portal",
-    "version": "16.0.1.0.4",
+    "version": "16.0.1.0.5",
     "author": "Elabore",
     "website": "https://elabore.coop",
     "maintainer": "Boris Gallet",
diff --git a/project_working_time_task_portal/migrations/16.0.1.0.5/post-migration.py b/project_working_time_task_portal/migrations/16.0.1.0.5/post-migration.py
new file mode 100644
index 0000000..483227a
--- /dev/null
+++ b/project_working_time_task_portal/migrations/16.0.1.0.5/post-migration.py
@@ -0,0 +1,9 @@
+from odoo import SUPERUSER_ID, api
+
+def migrate(cr, version):
+    env = api.Environment(cr, SUPERUSER_ID, {})
+
+    tasks = env["project.task"].search([("stage_id.fold", "=", False)])
+    tasks._compute_billable_effective_hours()
+
+    cr.commit()