diff --git a/baph/auth/models/oauth_/__init__.py b/baph/auth/models/oauth_/__init__.py
index b39a657..06d06b6 100644
--- a/baph/auth/models/oauth_/__init__.py
+++ b/baph/auth/models/oauth_/__init__.py
@@ -11,10 +11,9 @@
 orm = ORM.get()
 Base = orm.Base
 
-MAX_KEY_LEN = 255
+MAX_KEY_LEN = 32
 MAX_SECRET_LEN = 255
-KEY_LEN = 32
-SECRET_LEN = 32
+MAX_NONCE_LEN = 33
 UNIQUE_KEY = getattr(settings, 'BAPH_UNIQUE_OAUTH_KEYS', True)
 
 
@@ -43,4 +42,4 @@ class OAuthNonce(Base):
     timestamp = Column(DateTime, nullable=False, index=True)
     token_key = Column(String(32))
     consumer_key = Column(String(MAX_KEY_LEN), nullable=False)
-    key = Column(String(255), nullable=False)
+    key = Column(String(MAX_NONCE_LEN), nullable=False)
diff --git a/baph/db/types.py b/baph/db/types.py
index e797a27..5d8288b 100644
--- a/baph/db/types.py
+++ b/baph/db/types.py
@@ -25,6 +25,7 @@
 class Email(types.TypeDecorator):
     impl = types.Unicode
 
+
 class UUID(types.TypeDecorator):
     '''Generic UUID column type for SQLAlchemy. Includes native support for
     PostgreSQL and a MySQL-specific implementation, in addition to the
@@ -75,13 +76,13 @@ def process_result_value(self, value, dialect=None):
     def is_mutable(self):
         return False
 
+
 class Json(types.TypeDecorator):
     impl = types.Unicode
 
     def process_bind_param(self, value, dialect):
         if value is None:
             return None
-        #return json.dumps(value)
         return json.dumps(value)
 
     def process_result_value(self, value, dialect):
@@ -89,17 +90,24 @@ def process_result_value(self, value, dialect):
             return None
         return json.loads(value)
 
+
 JsonType = Json
 
+
 class JsonText(JsonType):
     impl = types.UnicodeText
 
-class List(JsonText):
 
+class List(JsonText):
     @property
     def python_type(self):
         return list
 
+
+class ListVarchar(List):
+    impl = types.Unicode
+
+
 # http://docs.sqlalchemy.org/en/latest/orm/extensions/mutable.html
 
 class MutableDict(Mutable, dict):
@@ -128,6 +136,7 @@ def __delitem__(self, key):
         dict.__delitem__(self, key)
         self.changed()
 
+
 class MutableList(Mutable, list):
     @classmethod
     def coerce(cls, key, value):
@@ -181,6 +190,11 @@ class Dict(JsonText):
     def python_type(self):
         return dict
 
+
+class DictVarchar(Dict):
+    impl = types.Unicode
+
+
 class TZAwareDateTime(types.TypeDecorator):
     impl = types.DateTime
 
diff --git a/baph/forms/forms.py b/baph/forms/forms.py
index ea661f3..d5dd723 100644
--- a/baph/forms/forms.py
+++ b/baph/forms/forms.py
@@ -31,11 +31,13 @@
     Boolean:        forms.BooleanField,
     types.Json:     fields.JsonField,
     types.List:     fields.ListField,
+    types.ListVarchar: fields.ListField,
     types.Dict:     fields.DictField,
+    types.DictVarchar: fields.DictField,
     types.Email:    forms.EmailField,
     'collection':   fields.MultiObjectField,
     'object':       fields.ObjectField,
-    }
+}
 ALL_FIELDS = '__all__'
 
 orm = ORM.get()