diff --git a/companies/models.py b/companies/models.py
index 84baff0..70c46ef 100644
--- a/companies/models.py
+++ b/companies/models.py
@@ -52,7 +52,7 @@ class Company(models.Model):
     created = models.DateTimeField('date of creation', auto_now_add=True)
     updated = models.DateTimeField('date last update', auto_now=True)
     creator = models.ForeignKey('core.CustomUser', on_delete=models.DO_NOTHING, null=True, blank=True, related_name='creator')
-    # history = models.ForeignKey(HistorySync, null=True, on_delete=models.DO_NOTHING, related_name='company')
+    history = models.ForeignKey(HistorySync, null=True, blank=True, on_delete=models.DO_NOTHING, related_name='company')
 
     class Meta:
         verbose_name = "Compañía"
diff --git a/products/models.py b/products/models.py
index 50cde7f..d3b4a16 100644
--- a/products/models.py
+++ b/products/models.py
@@ -69,8 +69,8 @@ class Product(models.Model):
     # internal
     created = models.DateTimeField('date of creation', auto_now_add=True)
     updated = models.DateTimeField('date last update', auto_now=True)
-    creator = models.ForeignKey('core.CustomUser', on_delete=models.SET_NULL, null=True, related_name='product')
-    history = models.ForeignKey('history.HistorySync', on_delete=models.SET_NULL, null=True, related_name='product')
+    creator = models.ForeignKey('core.CustomUser', on_delete=models.SET_NULL, null=True, blank=True, related_name='product')
+    history = models.ForeignKey('history.HistorySync', on_delete=models.SET_NULL, null=True, blank=True, related_name='product')
 
     def __str__(self):
         return f"{self.name} / {self.sku}"