diff --git a/beer/models.py b/beer/models.py
index 7ccf7ed..04660a3 100644
--- a/beer/models.py
+++ b/beer/models.py
@@ -14,7 +14,10 @@ logger = logging.getLogger('django')
 
 class CustomModel(models.Model):
     """ Custom model class with default fields to use. """
-    created_date = models.DateTimeField(default=timezone.now)
+    created_date = models.DateTimeField(
+        default=timezone.now,
+        editable=False
+    )
 
     class Meta:
         abstract = True
@@ -144,7 +147,10 @@ class Supplier(CustomModel):
 
 class CustomIngredient(CustomModel):
     """ Custom model class with default fields to use. """
-    created_date = models.DateTimeField(default=timezone.now)
+    created_date = models.DateTimeField(
+        default=timezone.now,
+        editable=False
+    )
     name = models.CharField(max_length=50)
     units = models.ForeignKey(Unit, on_delete=models.PROTECT)
     unit_cost = models.DecimalField(