diff --git a/disco/gateway/events.py b/disco/gateway/events.py
index 6430d84..f74431e 100644
--- a/disco/gateway/events.py
+++ b/disco/gateway/events.py
@@ -4,12 +4,12 @@ import inflection
 import six
 
 from disco.types.user import User, Presence
-from disco.types.channel import Channel
+from disco.types.channel import Channel, PermissionOverwrite
 from disco.types.message import Message, MessageReactionEmoji
 from disco.types.voice import VoiceState
 from disco.types.guild import Guild, GuildMember, Role, GuildEmoji
 
-from disco.types.base import Model, ModelMeta, Field, ListField, snowflake, lazy_datetime
+from disco.types.base import Model, ModelMeta, Field, ListField, AutoDictField, snowflake, lazy_datetime
 
 # Mapping of discords event name to our event classes
 EVENTS_MAP = {}
@@ -217,6 +217,7 @@ class ChannelUpdate(ChannelCreate):
     channel : :class:`disco.types.channel.Channel`
         The channel which was updated.
     """
+    overwrites = AutoDictField(PermissionOverwrite, 'id', alias='permission_overwrites')
 
 
 @wraps_model(Channel)
diff --git a/disco/state.py b/disco/state.py
index 86bbcb9..ddca31c 100644
--- a/disco/state.py
+++ b/disco/state.py
@@ -5,6 +5,7 @@ import inflection
 from collections import deque, namedtuple
 from gevent.event import Event
 
+from disco.types.base import UNSET
 from disco.util.config import Config
 from disco.util.hashmap import HashMap, DefaultHashMap
 
@@ -211,6 +212,10 @@ class State(object):
         if event.channel.id in self.channels:
             self.channels[event.channel.id].update(event.channel)
 
+            if event.overwrites is not UNSET:
+                self.channels[event.channel.id].overwrites = event.overwrites
+                self.channels[event.channel.id].after_load()
+
     def on_channel_delete(self, event):
         if event.channel.is_guild and event.channel.guild and event.channel.id in event.channel.guild.channels:
             del event.channel.guild.channels[event.channel.id]
diff --git a/disco/types/base.py b/disco/types/base.py
index 0cf0646..d12de6e 100644
--- a/disco/types/base.py
+++ b/disco/types/base.py
@@ -40,11 +40,12 @@ class ConversionError(Exception):
 
 
 class Field(object):
-    def __init__(self, value_type, alias=None, default=None, create=True, ignore_dump=None, **kwargs):
+    def __init__(self, value_type, alias=None, default=None, create=True, ignore_dump=None, cast=None, **kwargs):
         # TODO: fix default bullshit
         self.src_name = alias
         self.dst_name = None
         self.ignore_dump = ignore_dump or []
+        self.cast = cast
         self.metadata = kwargs
 
         if default is not None:
@@ -101,6 +102,8 @@ class Field(object):
         elif isinstance(value, Model):
             return value.to_dict(ignore=(inst.ignore_dump if inst else []))
         else:
+            if inst and inst.cast:
+                return inst.cast(value)
             return value
 
     def __call__(self, raw, client):
diff --git a/disco/types/channel.py b/disco/types/channel.py
index 4a26c05..664fd94 100644
--- a/disco/types/channel.py
+++ b/disco/types/channel.py
@@ -48,8 +48,8 @@ class PermissionOverwrite(ChannelSubType):
     """
     id = Field(snowflake)
     type = Field(enum(PermissionOverwriteType))
-    allow = Field(PermissionValue)
-    deny = Field(PermissionValue)
+    allow = Field(PermissionValue, cast=int)
+    deny = Field(PermissionValue, cast=int)
 
     channel_id = Field(snowflake)
 
@@ -67,6 +67,13 @@ class PermissionOverwrite(ChannelSubType):
             channel_id=channel.id
         ).save()
 
+    @property
+    def compiled(self):
+        value = PermissionValue()
+        value -= self.deny
+        value += self.allow
+        return value
+
     def save(self):
         self.client.api.channels_permissions_modify(self.channel_id,
                                                     self.id,
@@ -117,7 +124,10 @@ class Channel(SlottedModel, Permissible):
 
     def __init__(self, *args, **kwargs):
         super(Channel, self).__init__(*args, **kwargs)
+        self.after_load()
 
+    def after_load(self):
+        # TODO: hackfix
         self.attach(six.itervalues(self.overwrites), {'channel_id': self.id, 'channel': self})
 
     def __str__(self):
diff --git a/disco/types/permissions.py b/disco/types/permissions.py
index ff43145..6e4d9f3 100644
--- a/disco/types/permissions.py
+++ b/disco/types/permissions.py
@@ -90,9 +90,12 @@ class PermissionValue(object):
         else:
             self.value &= ~Permissions[name].value
 
+    def __int__(self):
+        return self.value
+
     def to_dict(self):
         return {
-            k: getattr(self, k) for k in Permissions.attrs
+            k: getattr(self, k) for k in Permissions.keys_
         }
 
     @classmethod