diff --git a/www/conservancy/apps/blog/models.py b/www/conservancy/apps/blog/models.py
index 4429a161cf2834a91ead5175a98eca6643265fc8..535e730363324d7e30c75cca833af5993c96174f 100644
--- a/www/conservancy/apps/blog/models.py
+++ b/www/conservancy/apps/blog/models.py
@@ -31,7 +31,7 @@ class Entry(models.Model, bsoup.SoupModelMixin):
     body = models.TextField(help_text="Use raw HTML.  Include the full body of the post.")
     pub_date = models.DateTimeField()
     author = models.ForeignKey(Person)
-    tags = models.ManyToManyField(EntryTag, null=True, blank=True)
+    tags = models.ManyToManyField(EntryTag, blank=True)
 
     date_created = models.DateTimeField(auto_now_add=True)
     date_last_modified = models.DateTimeField(auto_now=True)
diff --git a/www/conservancy/apps/events/models.py b/www/conservancy/apps/events/models.py
index 19e271980a4b88972840e7b5a43e3ed4b4114752..1d6cf8c5897b5ad21bef989edde2007ec5851b8c 100644
--- a/www/conservancy/apps/events/models.py
+++ b/www/conservancy/apps/events/models.py
@@ -38,11 +38,11 @@ class Event(models.Model):
     datetime = models.CharField("Date and Time", max_length=300, blank=True)
     slug = models.SlugField(unique_for_year='date')
     description = models.TextField(blank=True)
-    people = models.ManyToManyField(Person, null=True, blank=True)
+    people = models.ManyToManyField(Person, blank=True)
     location = models.CharField(max_length=1000)
     earth_location = models.ForeignKey(EarthLocation, null=True, blank=True,
                                        help_text="Label will not be displayed")
-    tags = models.ManyToManyField(EventTag, null=True, blank=True)
+    tags = models.ManyToManyField(EventTag, blank=True)
 
     date_created = models.DateTimeField(auto_now_add=True)
     date_last_modified = models.DateTimeField(auto_now=True)
diff --git a/www/conservancy/apps/news/models.py b/www/conservancy/apps/news/models.py
index 9b5569582c591e500213777e3b85da75a6167f85..9c9383742eef8837597a43477aeb14d8ca51e209 100644
--- a/www/conservancy/apps/news/models.py
+++ b/www/conservancy/apps/news/models.py
@@ -98,8 +98,8 @@ class ExternalArticle(models.Model):
     date = models.DateField()
     visible = models.BooleanField(help_text="Whether to display on website", default=True)
 
-    tags = models.ManyToManyField(ExternalArticleTag, null=True, blank=True)
-    people = models.ManyToManyField(Person, null=True, blank=True)
+    tags = models.ManyToManyField(ExternalArticleTag, blank=True)
+    people = models.ManyToManyField(Person, blank=True)
     event = models.ForeignKey(Event, null=True, blank=True)
     press_release = models.ForeignKey(PressRelease, null=True, blank=True)