diff --git a/apps/addons/models.py b/apps/addons/models.py
index ea588b4301..057739c62b 100644
--- a/apps/addons/models.py
+++ b/apps/addons/models.py
@@ -2,7 +2,6 @@ from django.conf import settings
 from django.db import models
 
 import amo
-from .models import Category
 from translations.fields import TranslatedField, translations_with_fallback
 
 
@@ -95,7 +94,7 @@ class Addon(amo.ModelBase):
 
 class AddonCategory(models.Model):
     addon = models.ForeignKey(Addon)
-    category = models.ForeignKey(Category)
+    category = models.ForeignKey('Category')
     feature = models.BooleanField(default=False)
     feature_locales = models.CharField(max_length=255, default='')
 
diff --git a/apps/blocklist/__init__.py b/apps/blocklist/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/apps/blocklist/models.py b/apps/blocklist/models.py
new file mode 100644
index 0000000000..ef2c471dd3
--- /dev/null
+++ b/apps/blocklist/models.py
@@ -0,0 +1,39 @@
+from django.db import models
+
+import amo
+
+
+class BlocklistApp(amo.ModelBase):
+    blitem = models.ForeignKey('BlocklistItem')
+    guid = models.CharField(max_length=255, blank=True, db_index=True)
+    min = models.CharField(max_length=255, blank=True)
+    max = models.CharField(max_length=255, blank=True)
+
+    class Meta(amo.ModelBase.Meta):
+        db_table = 'blapps'
+
+
+class BlocklistItem(amo.ModelBase):
+    guid = models.CharField(max_length=255, blank=True)
+    min = models.CharField(max_length=255, blank=True)
+    max = models.CharField(max_length=255, blank=True)
+    os = models.CharField(max_length=255, blank=True)
+    severity = models.SmallIntegerField(null=True)
+
+    class Meta(amo.ModelBase.Meta):
+        db_table = 'blitems'
+
+
+class BlocklistPlugin(amo.ModelBase):
+    name = models.CharField(max_length=255, blank=True)
+    guid = models.CharField(max_length=255, blank=True)
+    min = models.CharField(max_length=255, blank=True)
+    max = models.CharField(max_length=255, blank=True)
+    os = models.CharField(max_length=255, blank=True)
+    xpcomabi = models.CharField(max_length=255, blank=True)
+    description = models.CharField(max_length=255, blank=True)
+    filename = models.CharField(max_length=255, blank=True)
+    severity = models.SmallIntegerField(null=True)
+
+    class Meta(amo.ModelBase.Meta):
+        db_table = 'blplugins'