diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index 45f26814a6..d56bb23816 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -56,8 +56,8 @@ class Task(NestedSet):
 	def validate_status(self):
 		if self.status!=self.get_db_value("status") and self.status == "Completed":
 			for d in self.depends_on:
-				if frappe.db.get_value("Task", d.task, "status") != "Completed":
-					frappe.throw(_("Cannot close task {0} as its dependant task {1} is not closed.").format(frappe.bold(self.name), frappe.bold(d.task)))
+				if frappe.db.get_value("Task", d.task, "status") not in ("Completed", "Cancelled"):
+					frappe.throw(_("Cannot complete task {0} as its dependant task {1} are not ccompleted / cancelled.").format(frappe.bold(self.name), frappe.bold(d.task)))
 
 			close_all_assignments(self.doctype, self.name)