diff --git a/xos/core/models/dashboard.py b/xos/core/models/dashboard.py
index 5228381..e667261 100644
--- a/xos/core/models/dashboard.py
+++ b/xos/core/models/dashboard.py
@@ -10,7 +10,7 @@
     url = StrippedCharField(max_length=1024, help_text="URL of Dashboard")
     controllers = models.ManyToManyField(Controller, blank=True, related_name="dashboardviews", through='ControllerDashboardView')
     enabled = models.BooleanField(default=True)
-    deployments = models.ManyToManyField(Deployment, blank=True, null=True, related_name="dashboardviews", help_text="Deployments that should be included in this view")
+    deployments = models.ManyToManyField(Deployment, blank=True, related_name="dashboardviews", help_text="Deployments that should be included in this view")
 
     def __unicode__(self):  return u'%s' % (self.name)
 
diff --git a/xos/core/models/serviceclass.py b/xos/core/models/serviceclass.py
index ccc3180..a51b476 100644
--- a/xos/core/models/serviceclass.py
+++ b/xos/core/models/serviceclass.py
@@ -16,7 +16,7 @@
     membershipFee = models.IntegerField(default=0)
     membershipFeeMonths = models.IntegerField(default=12)
     upgradeRequiresApproval = models.BooleanField(default=False)
-    upgradeFrom = models.ManyToManyField('self', blank=True, null=True)
+    upgradeFrom = models.ManyToManyField('self', blank=True)
 
     class Meta(PlCoreBase.Meta):
        verbose_name_plural = "Service classes"