diff --git a/positions/models.py b/positions/models.py
index 4323297..d529aa5 100644
--- a/positions/models.py
+++ b/positions/models.py
@@ -35,3 +35,4 @@ class Position(models.Model):
     class Meta:
         verbose_name = "职位"
         verbose_name_plural = "职位列表"
+        unique_together = ['title', 'website', 'company']