diff --git a/recipes/models.py b/recipes/models.py
index 9ecfc3c..80a66ad 100644
--- a/recipes/models.py
+++ b/recipes/models.py
@@ -16,7 +16,7 @@ class Version(models.Model):
 	label = models.CharField(max_length=20, default='Original')
 	slug = models.SlugField(max_length=20, default='original')
 	body = models.TextField(null=True, blank=True)
-	user = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, blank=True)
+	user = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False)
 	author = models.CharField(max_length=30, blank=True)
 	recipe = models.ForeignKey(Recipe, on_delete=models.PROTECT, null=False, blank=False, related_name='versions')