diff --git a/length_notifier/length_notifier.py b/length_notifier/length_notifier.py
index ae35266..82956c7 100644
--- a/length_notifier/length_notifier.py
+++ b/length_notifier/length_notifier.py
@@ -90,11 +90,11 @@ class LengthNotifierPlugin(GajimPlugin):
             # Not restricted to any JIDs
             return True
 
-        current_jid = JID(jid)
+        current_jid = JID.from_string(jid)
         allowed_jids = self.config['JIDS'].split(',')
         for allowed_jid in allowed_jids:
             try:
-                address = JID(allowed_jid.strip())
+                address = JID.from_string(allowed_jid.strip())
             except Exception as error:
                 log.debug('Error parsing JID: %s (%s)' % (error, allowed_jid))
                 continue
diff --git a/omemo/modules/omemo.py b/omemo/modules/omemo.py
index 90fede3..b39cb02 100644
--- a/omemo/modules/omemo.py
+++ b/omemo/modules/omemo.py
@@ -267,7 +267,7 @@ class OMEMO(BaseModule):
 
         contact = app.contacts.get_gc_contact(self._account, room_jid, resource)
         if contact is not None:
-            return JID(contact.jid).bare
+            return JID.from_string(contact.jid).bare
 
         self._log.info('Groupchat: Last resort trying to find SID in DB')
         from_jid = self.backend.storage.getJidFromDevice(properties.omemo.sid)
diff --git a/openpgp/pgpplugin.py b/openpgp/pgpplugin.py
index 62692cf..4ca0b03 100644
--- a/openpgp/pgpplugin.py
+++ b/openpgp/pgpplugin.py
@@ -140,7 +140,7 @@ class OpenPGPPlugin(GajimPlugin):
             keys = app.connections[account].get_module('OpenPGP').get_keys(
                 jid, only_trusted=False)
             if not keys:
-                con.get_module('OpenPGP').request_keylist(JID(jid))
+                con.get_module('OpenPGP').request_keylist(JID.from_string(jid))
                 ErrorDialog(
                     _('No OpenPGP key'),
                     _('We didnt receive a OpenPGP key from this contact.'))
diff --git a/tictactoe/plugin.py b/tictactoe/plugin.py
index 112bb3e..cbac350 100644
--- a/tictactoe/plugin.py
+++ b/tictactoe/plugin.py
@@ -254,7 +254,7 @@ class TicTacToeSession():
         self.conn = conn
         self.jid = jid
         self.type_ = type_
-        self.resource = jid.resource()
+        self.resource = jid.resource
 
         if thread_id:
             self.received_thread_id = True