diff --git a/treenode/models.py b/treenode/models.py
index 78dea34..0a271f4 100644
--- a/treenode/models.py
+++ b/treenode/models.py
@@ -112,7 +112,7 @@ class Meta(TreeNodeModel.Meta):
 
     tn_priority = models.PositiveIntegerField(
         default=0,
-        validators=[MinValueValidator(0), MaxValueValidator(9999)],
+        validators=[MinValueValidator(0), MaxValueValidator(9999999999)],
         verbose_name=_("Priority"),
     )