diff --git a/CHANGES.rst b/CHANGES.rst
index c32edfc..d4f73c2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -14,7 +14,8 @@ New features:
 
 Bug fixes:
 
-- *add item here*
+- Some Python 3 fixes.
+  [pbauer]
 
 
 3.3.8 (2018-06-18)
diff --git a/plone/app/iterate/archiver.py b/plone/app/iterate/archiver.py
index b61cb68..f962003 100644
--- a/plone/app/iterate/archiver.py
+++ b/plone/app/iterate/archiver.py
@@ -24,7 +24,7 @@
 from zope.component import adapter
 from zope.interface import implementer
 
-import interfaces
+from . import interfaces
 
 
 @implementer(interfaces.IObjectArchiver)
diff --git a/plone/app/iterate/copier.py b/plone/app/iterate/copier.py
index acd0134..32b77ed 100644
--- a/plone/app/iterate/copier.py
+++ b/plone/app/iterate/copier.py
@@ -34,7 +34,7 @@
 from Products.Archetypes.Referenceable import Referenceable
 from Products.CMFCore.utils import getToolByName
 from Products.DCWorkflow.DCWorkflow import DCWorkflowDefinition
-from relation import WorkingCopyRelation
+from .relation import WorkingCopyRelation
 from ZODB.PersistentMapping import PersistentMapping
 from zope import component
 from zope import interface
diff --git a/plone/app/iterate/dexterity/copier.py b/plone/app/iterate/dexterity/copier.py
index d8a474f..fdcb552 100644
--- a/plone/app/iterate/dexterity/copier.py
+++ b/plone/app/iterate/dexterity/copier.py
@@ -123,9 +123,9 @@ def _get_relation_to_baseline(self):
         id = intids.getId(context)
         # ask catalog
         catalog = component.getUtility(ICatalog)
-        relations = list(catalog.findRelations({'to_id': id}))
-        relations = filter(lambda r: r.from_attribute == ITERATE_RELATION_NAME,
-                           relations)
+        relations = catalog.findRelations({'to_id': id})
+        relations = [i for i in relations
+                     if i.from_attribute == ITERATE_RELATION_NAME]
         # do we have a baseline in our relations?
         if relations and not len(relations) == 1:
             raise interfaces.CheckinException('Baseline count mismatch')
diff --git a/plone/app/iterate/dexterity/utils.py b/plone/app/iterate/dexterity/utils.py
index dcb1947..e1dd41b 100644
--- a/plone/app/iterate/dexterity/utils.py
+++ b/plone/app/iterate/dexterity/utils.py
@@ -24,7 +24,7 @@ def get_relations(context):
         lambda r: r.from_attribute == ITERATE_RELATION_NAME,
         relations
     )
-    return relations
+    return list(relations)
 
 
 def get_checkout_relation(context):
diff --git a/plone/app/iterate/event.py b/plone/app/iterate/event.py
index 398ee47..4cd89ae 100644
--- a/plone/app/iterate/event.py
+++ b/plone/app/iterate/event.py
@@ -26,7 +26,7 @@
 from zope.event import notify
 from zope.interface import implementer
 
-import interfaces
+from . import interfaces
 
 
 @implementer(interfaces.ICheckoutEvent)
diff --git a/plone/app/iterate/permissions.py b/plone/app/iterate/permissions.py
index 39faf34..7978780 100644
--- a/plone/app/iterate/permissions.py
+++ b/plone/app/iterate/permissions.py
@@ -21,12 +21,11 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 ##################################################################
 
-from Products.CMFCore.permissions import setDefaultRoles
-
+from AccessControl.Permission import addPermission
 
 CheckinPermission = 'iterate : Check in content'
 CheckoutPermission = 'iterate : Check out content'
 
 DEFAULT_ROLES = ('Manager', 'Owner', 'Site Administrator', 'Editor')
-setDefaultRoles(CheckinPermission, DEFAULT_ROLES)
-setDefaultRoles(CheckoutPermission, DEFAULT_ROLES)
+addPermission(CheckinPermission, default_roles=DEFAULT_ROLES)
+addPermission(CheckoutPermission, default_roles=DEFAULT_ROLES)
diff --git a/setup.py b/setup.py
index 96763bd..5e2dace 100644
--- a/setup.py
+++ b/setup.py
@@ -18,11 +18,14 @@
         'Environment :: Web Environment',
         'Framework :: Plone',
         'Framework :: Plone :: 5.1',
+        'Framework :: Plone :: 5.2',
         'Framework :: Zope2',
         'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ],
     keywords='check-out check-in staging',
     author='Plone Foundation',