diff --git a/docs/HISTORY.txt b/docs/HISTORY.txt
index cf19166..b5d2b34 100644
--- a/docs/HISTORY.txt
+++ b/docs/HISTORY.txt
@@ -5,7 +5,7 @@ Changelog
 3.0.8 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Plone5.2/6 and Python3 compatibility. [gbastien]
 
 
 3.0.7 (2022-07-01)
diff --git a/ftw/referencewidget/browser/generate_pathbar.py b/ftw/referencewidget/browser/generate_pathbar.py
index a697f8f..7348dff 100644
--- a/ftw/referencewidget/browser/generate_pathbar.py
+++ b/ftw/referencewidget/browser/generate_pathbar.py
@@ -8,6 +8,10 @@
 from Products.CMFPlone.interfaces.siteroot import IPloneSiteRoot
 from Products.Five import BrowserView
 import json
+import sys
+
+if sys.version_info.major == 3:
+    unicode = bytes
 
 
 class GeneratePathbar(BrowserView):
diff --git a/ftw/referencewidget/browser/search.py b/ftw/referencewidget/browser/search.py
index 9306a51..de62356 100644
--- a/ftw/referencewidget/browser/search.py
+++ b/ftw/referencewidget/browser/search.py
@@ -45,10 +45,8 @@ def __call__(self):
         if not uid:
             query = {'portal_type': search_types,
                      'Title': search_term,
-                     'sort_order': self.request.get('sort_order',
-                                                    u'ascending').encode('utf-8'),
-                     'sort_on': self.request.get('sort_on',
-                                                 u'modified').encode('utf-8')}
+                     'sort_order': self.request.get('sort_order') or u'ascending',
+                     'sort_on': self.request.get('sort_on') or u'modified'}
             if only_current_path and request_path:
                 query['path'] = request_path
 
diff --git a/ftw/referencewidget/locales/fr/LC_MESSAGES/ftw.referencewidget.po b/ftw/referencewidget/locales/fr/LC_MESSAGES/ftw.referencewidget.po
new file mode 100644
index 0000000..ef16d36
--- /dev/null
+++ b/ftw/referencewidget/locales/fr/LC_MESSAGES/ftw.referencewidget.po
@@ -0,0 +1,66 @@
+# --- PLEASE EDIT THE LINES BELOW CORRECTLY ---
+# SOME DESCRIPTIVE TITLE.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"POT-Creation-Date: 2016-10-20 14:54+0000\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI +ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=1; plural=0\n"
+"Preferred-Encodings: utf-8 latin1\n"
+
+#: ./ftw/referencewidget/templates/referencewidget_input.pt:11
+msgid "Browse"
+msgstr "Chercher"
+
+#: ./ftw/referencewidget/configure.zcml:33
+msgid "Register ftw.referencewidget generally"
+msgstr "Register ftw.referencewidget generally"
+
+msgid "ascending"
+msgstr "Ascendant"
+
+#. Default: "Close"
+#: ./ftw/referencewidget/widget.py:71
+msgid "button_close"
+msgstr "Fermer"
+
+#. Default: "Search"
+#: ./ftw/referencewidget/widget.py:70
+msgid "button_seach"
+msgstr "Chercher"
+
+msgid "created"
+msgstr "Créé"
+
+msgid "descending"
+msgstr "Descendant"
+
+#: ./ftw/referencewidget/configure.zcml:33
+msgid "ftw.referencewidget"
+msgstr "ftw.referencewidget"
+
+#. Default: "Sort by"
+#: ./ftw/referencewidget/widget.py:72
+msgid "label_sort_by"
+msgstr "Trier par"
+
+msgid "modified"
+msgstr "Modifié"
+
+msgid "no sort"
+msgstr "Non trié"
+
+msgid "sortable_title"
+msgstr "Titre"
+
+#. Default: "Search only in current path"
+#: ./ftw/referencewidget/widget.py:82
+msgid "checkbox_search_current_path"
+msgstr "Uniquement dans le dossier courant"
+
diff --git a/ftw/referencewidget/selectable.py b/ftw/referencewidget/selectable.py
index b9addbd..d69b9b1 100644
--- a/ftw/referencewidget/selectable.py
+++ b/ftw/referencewidget/selectable.py
@@ -1,5 +1,5 @@
 from ftw.referencewidget.browser.utils import get_selectable_types_by_source
-from zope.interface import implements
+from zope.interface import implementer
 from zope.interface import Interface
 
 
@@ -16,8 +16,8 @@ def is_selectable():
         """
 
 
+@implementer(ISelectable)
 class DefaultSelectable(object):
-    implements(ISelectable)
 
     def __init__(self, source, content):
         self.source = source
diff --git a/ftw/referencewidget/sources.py b/ftw/referencewidget/sources.py
index c9dae11..3756e06 100644
--- a/ftw/referencewidget/sources.py
+++ b/ftw/referencewidget/sources.py
@@ -3,15 +3,15 @@
 from plone import api
 from Products.CMFCore.interfaces import IContentish
 from zope.component.hooks import getSite
-from zope.interface import implements
+from zope.interface import implementer
 from zope.interface.verify import verifyClass
 from zope.schema.interfaces import IContextSourceBinder
 from zope.schema.interfaces import ISource
 
 
+@implementer(ISource)
 class ReferenceObjPathSource(object):
 
-    implements(ISource)
 
     def __init__(self, context, selectable_class, selectable, nonselectable,
                  override, allow_nonsearched_types, root_path):
@@ -38,8 +38,8 @@ def __contains__(self, value):
             raise TypeError('Not a ISelectable class provided')
 
 
+@implementer(IContextSourceBinder)
 class ReferenceObjSourceBinder(object):
-    implements(IContextSourceBinder)
 
     def __init__(self,
                  selectable_class=None,
diff --git a/ftw/referencewidget/widget.py b/ftw/referencewidget/widget.py
index 686fac1..9e5eb62 100644
--- a/ftw/referencewidget/widget.py
+++ b/ftw/referencewidget/widget.py
@@ -16,15 +16,15 @@
 from zope.component import queryUtility
 from zope.i18n import translate
 from zope.interface import implementer
-from zope.interface import implementsOnly
+from zope.interface import implementer_only
 from zope.schema.interfaces import IList
 import json
 import os
 
 
+@implementer_only(IReferenceWidget)
 class ReferenceBrowserWidget(widget.HTMLTextInputWidget, Widget):
     """ Datepicker widget. """
-    implementsOnly(IReferenceWidget)
 
     klass = u'reference-widget'
     request = None