diff --git a/ckanext/datarequests/db.py b/ckanext/datarequests/db.py
index 17874cef..94eb10a0 100644
--- a/ckanext/datarequests/db.py
+++ b/ckanext/datarequests/db.py
@@ -64,8 +64,8 @@ def get_ordered_by_date(cls, **kw):
         datarequests_table = sa.Table('datarequests', model.meta.metadata,
             sa.Column('user_id', sa.types.UnicodeText, primary_key=False, default=u''),
             sa.Column('id', sa.types.UnicodeText, primary_key=True, default=uuid4),
-            sa.Column('title', sa.types.UnicodeText(constants.NAME_MAX_LENGTH), primary_key=True, default=u''),
-            sa.Column('description', sa.types.UnicodeText(constants.DESCRIPTION_MAX_LENGTH), primary_key=False, default=u''),
+            sa.Column('title', sa.types.Unicode(constants.NAME_MAX_LENGTH), primary_key=True, default=u''),
+            sa.Column('description', sa.types.Unicode(constants.DESCRIPTION_MAX_LENGTH), primary_key=False, default=u''),
             sa.Column('organization_id', sa.types.UnicodeText, primary_key=False, default=None),
             sa.Column('open_time', sa.types.DateTime, primary_key=False, default=None),
             sa.Column('accepted_dataset_id', sa.types.UnicodeText, primary_key=False, default=None),
@@ -102,7 +102,7 @@ def get_ordered_by_date(cls, **kw):
             sa.Column('user_id', sa.types.UnicodeText, primary_key=False, default=u''),
             sa.Column('datarequest_id', sa.types.UnicodeText, primary_key=True, default=uuid4),
             sa.Column('time', sa.types.DateTime, primary_key=True, default=u''),
-            sa.Column('comment', sa.types.UnicodeText(constants.COMMENT_MAX_LENGTH), primary_key=False, default=u'')
+            sa.Column('comment', sa.types.Unicode(constants.COMMENT_MAX_LENGTH), primary_key=False, default=u'')
         )
 
         # Create the table only if it does not exist