diff --git a/project_working_time_task_portal/models/__init__.py b/project_working_time_task_portal/models/__init__.py
index 9f8dbe4..c0a4576 100644
--- a/project_working_time_task_portal/models/__init__.py
+++ b/project_working_time_task_portal/models/__init__.py
@@ -1 +1 @@
-from . import billable_time, account_analytic_line
\ No newline at end of file
+from . import project_task, account_analytic_line
diff --git a/project_working_time_task_portal/models/billable_time.py b/project_working_time_task_portal/models/project_task.py
similarity index 100%
rename from project_working_time_task_portal/models/billable_time.py
rename to project_working_time_task_portal/models/project_task.py