diff --git a/cor_custom/models/project.py b/cor_custom/models/project.py
index 25c2e06..5079f94 100755
--- a/cor_custom/models/project.py
+++ b/cor_custom/models/project.py
@@ -328,5 +328,5 @@ class CustomProjectTags(models.Model):
 class InheritProjectTask(models.Model):
     _inherit = 'project.task'
 
-    start_date = fields.Float(string='Start Date')
+    start_date = fields.Date(string='Start Date')