diff --git a/pysollib/customgame.py b/pysollib/customgame.py
index cac707894..f72a1df99 100644
--- a/pysollib/customgame.py
+++ b/pysollib/customgame.py
@@ -70,8 +70,6 @@
     UNLIMITED_MOVES
 from pysollib.wizardutil import WizardWidgets
 
-import six
-
 # ************************************************************************
 # *
 # ************************************************************************
@@ -80,7 +78,7 @@
 def get_settings(ss):
     s = {}
     for w in WizardWidgets:
-        if isinstance(w, six.string_types):
+        if isinstance(w, str):
             continue
         if w.var_name in ss:
             v = ss[w.var_name]
diff --git a/pysollib/game/__init__.py b/pysollib/game/__init__.py
index b41d7cc4d..633f257f5 100644
--- a/pysollib/game/__init__.py
+++ b/pysollib/game/__init__.py
@@ -26,6 +26,7 @@
 import random
 import time
 import traceback
+from io import BytesIO
 from pickle import Pickler, Unpickler, UnpicklingError
 
 import attr
@@ -68,10 +69,6 @@
 from pysollib.settings import VERSION, VERSION_TUPLE
 from pysollib.struct_new import NewStruct
 
-import six
-from six import BytesIO
-from six.moves import range
-
 if TOOLKIT == 'tk':
     from pysollib.ui.tktile.solverdialog import reset_solver_dialog
 else:
@@ -104,7 +101,7 @@ def _updateStatus_process_key_val(tb, sb, k, v):
             # self.top.wm_title("%s - %s"
             # % (TITLE, self.getTitleName()))
             return
-        if isinstance(v, six.string_types):
+        if isinstance(v, str):
             if sb:
                 sb.updateText(gamenumber=v)
             # self.top.wm_title("%s - %s %s" % (TITLE,
@@ -146,7 +143,7 @@ def _updateStatus_process_key_val(tb, sb, k, v):
             if tb:
                 tb.updateText(player=_("Player\n"))
             return
-        if isinstance(v, six.string_types):
+        if isinstance(v, str):
             if tb:
                 # if self.app.opt.toolbar_size:
                 if tb.getSize():
@@ -168,7 +165,7 @@ def _updateStatus_process_key_val(tb, sb, k, v):
         if v is None:
             if sb:
                 sb.updateText(time='')
-        if isinstance(v, six.string_types):
+        if isinstance(v, str):
             if sb:
                 sb.updateText(time=v)
         return
@@ -1341,7 +1338,7 @@ def updateStatus(self, **kw):
         if self.preview:
             return
         tb, sb = self.app.toolbar, self.app.statusbar
-        for k, v in six.iteritems(kw):
+        for k, v in kw.items():
             _updateStatus_process_key_val(tb, sb, k, v)
 
     def _unmapHandler(self, event):
diff --git a/pysollib/games/mahjongg/mahjongg.py b/pysollib/games/mahjongg/mahjongg.py
index 4a1fb784b..11d025a9a 100644
--- a/pysollib/games/mahjongg/mahjongg.py
+++ b/pysollib/games/mahjongg/mahjongg.py
@@ -40,8 +40,6 @@
         OpenStack
 from pysollib.util import ANY_SUIT, NO_RANK
 
-from six.moves import range
-
 
 def factorial(x):
     if x <= 1:
diff --git a/pysollib/games/mahjongg/shisensho.py b/pysollib/games/mahjongg/shisensho.py
index a08da89cd..0d341383d 100644
--- a/pysollib/games/mahjongg/shisensho.py
+++ b/pysollib/games/mahjongg/shisensho.py
@@ -37,8 +37,6 @@
         InitialDealTalonStack
 from pysollib.util import ANY_SUIT
 
-from six.moves import range
-
 
 class Shisen_Hint(AbstractHint):
     TOP_MATCHING = False
diff --git a/pysollib/games/special/samegame.py b/pysollib/games/special/samegame.py
index 34552e5f5..8500f291d 100644
--- a/pysollib/games/special/samegame.py
+++ b/pysollib/games/special/samegame.py
@@ -34,8 +34,6 @@
         OpenStack
 from pysollib.util import ANY_SUIT
 
-from six.moves import range
-
 
 # ************************************************************************
 # * Samegame
diff --git a/pysollib/hint.py b/pysollib/hint.py
index 2b0054d81..4810ce808 100644
--- a/pysollib/hint.py
+++ b/pysollib/hint.py
@@ -33,8 +33,6 @@
 from pysollib.settings import DEBUG, FCS_COMMAND
 from pysollib.util import KING
 
-import six
-
 FCS_VERSION = None
 
 # ************************************************************************
@@ -819,7 +817,7 @@ def run_solver(self, command, board):
         if os.name != 'nt':
             kw['close_fds'] = True
         p = subprocess.Popen(command, **kw)
-        bytes_board = six.binary_type(board, 'utf-8')
+        bytes_board = bytes(board, 'utf-8')
         pout, perr = p.communicate(bytes_board)
         if p.returncode in (127, 1):
             # Linux and Windows return codes for "command not found" error
@@ -1018,7 +1016,7 @@ def computeHints(self):
                 FCS_VERSION = (5, 0, 0)
             else:
                 pout, _ = self.run_solver(FCS_COMMAND + ' --version', '')
-                s = six.text_type(pout.read(), encoding='utf-8')
+                s = str(pout.read(), encoding='utf-8')
                 m = re.search(r'version ([0-9]+)\.([0-9]+)\.([0-9]+)', s)
                 if m:
                     FCS_VERSION = (int(m.group(1)), int(m.group(2)),
@@ -1082,7 +1080,7 @@ def computeHints(self):
             states = 0
 
             for sbytes in pout:
-                s = six.text_type(sbytes, encoding='utf-8')
+                s = str(sbytes, encoding='utf-8')
                 if DEBUG >= 5:
                     print(s)
 
@@ -1127,7 +1125,7 @@ def computeHints(self):
                 self.solver_state = 'unsolved'
         else:
             for sbytes in pout:
-                s = six.text_type(sbytes, encoding='utf-8')
+                s = str(sbytes, encoding='utf-8')
                 if DEBUG:
                     print(s)
                 if self._determineIfSolverState(s):
@@ -1356,7 +1354,7 @@ def computeHints(self):
             pout, perr = self.run_solver(command, board)
 
             for sbytes in pout:
-                s = six.text_type(sbytes, encoding='utf-8')
+                s = str(sbytes, encoding='utf-8')
                 if DEBUG >= 5:
                     print(s)
 
@@ -1390,7 +1388,7 @@ def computeHints(self):
         else:
             self.solver_state = result.lower()
             for sbytes in pout:
-                s = six.text_type(sbytes, encoding='utf-8')
+                s = str(sbytes, encoding='utf-8')
                 if DEBUG:
                     print(s)
 
diff --git a/pysollib/kivy/selectgame.py b/pysollib/kivy/selectgame.py
index 4b84ccdf0..99ca74b97 100644
--- a/pysollib/kivy/selectgame.py
+++ b/pysollib/kivy/selectgame.py
@@ -21,6 +21,8 @@
 #
 # ---------------------------------------------------------------------------#
 
+from collections import UserList
+
 from kivy.clock import Clock
 
 from pysollib.gamedb import GI
@@ -33,8 +35,6 @@
 from pysollib.kivy.selecttree import SelectDialogTreeLeaf, SelectDialogTreeNode
 from pysollib.mygettext import _
 
-from six.moves import UserList
-
 
 # ************************************************************************
 # * Nodes
diff --git a/pysollib/mfxutil.py b/pysollib/mfxutil.py
index d980204ee..13044e7cb 100644
--- a/pysollib/mfxutil.py
+++ b/pysollib/mfxutil.py
@@ -31,9 +31,6 @@
 
 from pysollib.settings import PACKAGE, TOOLKIT
 
-import six
-from six import print_
-
 Image = ImageTk = ImageOps = ImageDraw = None
 if TOOLKIT == 'tk':
     try:  # PIL
@@ -125,9 +122,9 @@ def print_err(s, level=1):
     elif level == 2:
         ss = PACKAGE+': DEBUG WARNING:'
     try:
-        print_(ss, s, file=sys.stderr)
+        print(ss, s, file=sys.stderr)
     except Exception:
-        print_(ss, s.encode(locale.getpreferredencoding()), file=sys.stderr)
+        print(ss, s.encode(locale.getpreferredencoding()), file=sys.stderr)
     sys.stderr.flush()
 
 
@@ -184,7 +181,7 @@ def getprefdir(package):
 def win32_getusername():
     user = os.environ.get('USERNAME', '').strip()
     try:
-        user = six.text_type(user, locale.getpreferredencoding())
+        user = str(user, locale.getpreferredencoding())
     except Exception:
         user = ''
     return user
diff --git a/pysollib/mygettext.py b/pysollib/mygettext.py
index 1855645e3..9d24ceedb 100644
--- a/pysollib/mygettext.py
+++ b/pysollib/mygettext.py
@@ -1,10 +1,8 @@
 import gettext
 import sys
 
-import six
 
-
-class myLocalGettext(object):
+class myLocalGettext:
     def __init__(self, lang):
         self.language = lang
 
@@ -19,8 +17,8 @@ def translation(self):
         return t
 
     def maketext(self, msg):
-        if not isinstance(msg, six.text_type):
-            return six.text_type(msg, 'utf-8')
+        if not isinstance(msg, str):
+            return str(msg, 'utf-8')
         return msg
 
     def ungettext(self, msgid1, msgid2, n):
diff --git a/pysollib/options.py b/pysollib/options.py
index da6c94ee3..7f43c1f39 100644
--- a/pysollib/options.py
+++ b/pysollib/options.py
@@ -35,9 +35,6 @@
 from pysollib.pysoltk import STATUSBAR_ITEMS, TOOLBAR_BUTTONS, TOOLKIT
 from pysollib.resource import CSI
 
-
-import six
-
 import validate
 
 # ************************************************************************
@@ -663,7 +660,7 @@ def save(self, filename):
             val = getattr(self, key)
             if isinstance(val, str):
                 if sys.version_info < (3,):
-                    val = six.text_type(val, 'utf-8')
+                    val = str(val, 'utf-8')
             config['general'][key] = val
 
         config['general']['recent_gameid'] = self.recent_gameid
diff --git a/pysollib/pysolgtk/statusbar.py b/pysollib/pysolgtk/statusbar.py
index 5ac50a494..47312c3ad 100644
--- a/pysollib/pysolgtk/statusbar.py
+++ b/pysollib/pysolgtk/statusbar.py
@@ -25,8 +25,6 @@
 
 from pysollib.mygettext import _
 
-import six
-
 
 class BasicStatusbar:
     def __init__(self, top, row, column, columnspan):
@@ -60,7 +58,7 @@ def updateText(self, **kw):
         for k, v in kw.items():
             label = getattr(self, k + "_label")
             label.pop(0)
-            label.push(0, six.text_type(v))
+            label.push(0, str(v))
 
     def config(self, name, show):
         # FIXME
@@ -70,7 +68,7 @@ def configLabel(self, name, **kw):
         label = getattr(self, name + "_label")
         # FIXME kw['fg']
         label.pop(0)
-        label.push(0, six.text_type(kw['text']))
+        label.push(0, str(kw['text']))
 
     def show(self, show=True, resize=False):
         if show:
diff --git a/pysollib/pysolgtk/tkhtml.py b/pysollib/pysolgtk/tkhtml.py
index f5d2e5d6d..aa182a1ab 100644
--- a/pysollib/pysolgtk/tkhtml.py
+++ b/pysollib/pysolgtk/tkhtml.py
@@ -38,8 +38,6 @@
 from pysollib.mygettext import _
 from pysollib.settings import TITLE
 
-import six
-
 from tkwidget import MfxMessageDialog
 
 if __name__ == '__main__':
@@ -71,7 +69,7 @@ def __init__(self, text, viewer, app):
         self.indent = ''
 
     def write(self, data):
-        data = six.text_type(data)
+        data = str(data)
         self.text.insert(self.text.get_end_iter(), data, len(data))
 
     def anchor_bgn(self, href, name, type):
diff --git a/pysollib/resource.py b/pysollib/resource.py
index 33176484f..0861f5913 100644
--- a/pysollib/resource.py
+++ b/pysollib/resource.py
@@ -29,8 +29,6 @@
 from pysollib.mygettext import _
 from pysollib.settings import DEBUG
 
-import six
-
 # ************************************************************************
 # * Abstract
 # ************************************************************************
@@ -477,7 +475,7 @@ def getPreviewCardNames(self):
 
     def updateCardback(self, backname=None, backindex=None):
         # update default back
-        if isinstance(backname, six.string_types):
+        if isinstance(backname, str):
             if backname in self.backnames:
                 backindex = self.backnames.index(backname)
         if isinstance(backindex, int):
diff --git a/pysollib/stats.py b/pysollib/stats.py
index 43ae131d6..0ee9f6946 100644
--- a/pysollib/stats.py
+++ b/pysollib/stats.py
@@ -27,8 +27,6 @@
 from pysollib.mfxutil import format_time
 from pysollib.mygettext import _
 
-from six.moves import range
-
 # ************************************************************************
 # *
 # ************************************************************************
diff --git a/pysollib/tile/selectgame.py b/pysollib/tile/selectgame.py
index f2a7cfd17..f979b7063 100644
--- a/pysollib/tile/selectgame.py
+++ b/pysollib/tile/selectgame.py
@@ -22,6 +22,7 @@
 # ---------------------------------------------------------------------------
 
 import os
+from collections import UserList
 
 from pysollib.gamedb import GI
 from pysollib.mfxutil import KwStruct, Struct, destruct
@@ -31,7 +32,6 @@
 from pysollib.ui.tktile.selecttree import SelectDialogTreeData
 from pysollib.ui.tktile.tkutil import bind, unbind_destroy
 
-from six.moves import UserList
 from six.moves import tkinter
 from six.moves import tkinter_ttk as ttk
 
diff --git a/pysollib/tile/selecttile.py b/pysollib/tile/selecttile.py
index 3536dd294..c7ad0bb45 100644
--- a/pysollib/tile/selecttile.py
+++ b/pysollib/tile/selecttile.py
@@ -29,7 +29,6 @@
 from pysollib.ui.tktile.selecttree import SelectDialogTreeData
 from pysollib.ui.tktile.tkutil import bind
 
-import six
 from six.moves import tkinter
 from six.moves import tkinter_colorchooser
 from six.moves import tkinter_ttk as ttk
@@ -276,7 +275,7 @@ def initKw(self, kw):
 
     def mDone(self, button):
         if button == 0:  # "OK" or double click
-            if isinstance(self.tree.selection_key, six.string_types):
+            if isinstance(self.tree.selection_key, str):
                 self.key = str(self.tree.selection_key)
             else:
                 self.key = self.tree.selection_key
@@ -378,7 +377,7 @@ def updatePreview(self, key, scaling=-1):
         canvas.deleteAllItems()
 
         self.preview_scaling = scaling
-        if isinstance(key, six.string_types):
+        if isinstance(key, str):
             if USE_PIL:
                 self.textScale['state'] = 'disabled'
             # solid color
diff --git a/pysollib/tile/statusbar.py b/pysollib/tile/statusbar.py
index b93b66c08..5cc03161f 100644
--- a/pysollib/tile/statusbar.py
+++ b/pysollib/tile/statusbar.py
@@ -27,7 +27,6 @@
 
 from pysollib.mygettext import _
 
-import six
 from six.moves import tkinter
 from six.moves import tkinter_ttk as ttk
 
@@ -97,7 +96,7 @@ def _createSizegrip(self):
     def updateText(self, **kw):
         for k, v in kw.items():
             label = getattr(self, k + '_label')
-            text = six.text_type(v)
+            text = str(v)
             width = label['width']
             if width and len(text) > width:
                 label['width'] = len(text)
diff --git a/pysollib/tile/tkwidget.py b/pysollib/tile/tkwidget.py
index 2e14d5feb..c0af8d00e 100644
--- a/pysollib/tile/tkwidget.py
+++ b/pysollib/tile/tkwidget.py
@@ -34,8 +34,6 @@
 from pysollib.ui.tktile.tkutil import bind, unbind_destroy
 from pysollib.ui.tktile.tkutil import makeToplevel, setTransient
 
-import six
-from six import PY2
 from six.moves import tkinter
 from six.moves import tkinter_font
 from six.moves import tkinter_ttk as ttk
@@ -121,9 +119,9 @@ def altKeyEvent(self, event):
             key = event.char
             try:
                 if os.name == 'nt':
-                    key = six.text_type(key, locale.getpreferredencoding())
+                    key = str(key, locale.getpreferredencoding())
                 else:
-                    key = six.text_type(key, 'utf-8')
+                    key = str(key, 'utf-8')
             except Exception:
                 pass
             else:
@@ -289,8 +287,6 @@ def __init__(self, parent, ex, title="Error", **kw):
                 (ex.errno, ex.strerror, repr(ex.filename))
         else:
             t = str(ex)
-        if PY2:
-            t = six.text_type(t, errors='replace')
         kw.text = text + t
         MfxMessageDialog.__init__(self, parent, title, **kw.getKw())
 
diff --git a/pysollib/tile/wizarddialog.py b/pysollib/tile/wizarddialog.py
index a33f061f5..8c28e74fa 100644
--- a/pysollib/tile/wizarddialog.py
+++ b/pysollib/tile/wizarddialog.py
@@ -26,7 +26,6 @@
 from pysollib.wizardpresets import presets
 from pysollib.wizardutil import WizardWidgets
 
-import six
 from six.moves import tkinter
 from six.moves import tkinter_ttk as ttk
 
@@ -49,7 +48,7 @@ def __init__(self, parent, title, app, **kw):
         notebook.pack(expand=True, fill='both')
 
         for w in WizardWidgets:
-            if isinstance(w, six.string_types):
+            if isinstance(w, str):
                 frame = ttk.Frame(notebook)
                 notebook.add(frame, text=w, sticky='nsew', padding=5)
                 frame.columnconfigure(1, weight=1)
@@ -128,7 +127,7 @@ def presetSelected(self, e, w):
         n = w.translation_map[n]
         p = presets[n]
         for w in WizardWidgets:
-            if isinstance(w, six.string_types):
+            if isinstance(w, str):
                 continue
             if w.var_name in p:
                 v = p[w.var_name]
diff --git a/pysollib/tk/selectgame.py b/pysollib/tk/selectgame.py
index 75fd009b5..cb9207785 100644
--- a/pysollib/tk/selectgame.py
+++ b/pysollib/tk/selectgame.py
@@ -22,6 +22,7 @@
 # ---------------------------------------------------------------------------
 
 import os
+from collections import UserList
 
 from pysollib.gamedb import GI
 from pysollib.mfxutil import KwStruct, Struct, destruct
@@ -31,7 +32,6 @@
 from pysollib.ui.tktile.selecttree import SelectDialogTreeData
 from pysollib.ui.tktile.tkutil import unbind_destroy
 
-from six.moves import UserList
 from six.moves import tkinter
 
 from .selecttree import SelectDialogTreeCanvas
diff --git a/pysollib/tk/selecttile.py b/pysollib/tk/selecttile.py
index 1365a9093..b586df4e5 100644
--- a/pysollib/tk/selecttile.py
+++ b/pysollib/tk/selecttile.py
@@ -26,7 +26,6 @@
 from pysollib.mygettext import _
 from pysollib.ui.tktile.selecttree import SelectDialogTreeData
 
-import six
 from six.moves import tkinter, tkinter_colorchooser
 
 from .selecttree import SelectDialogTreeCanvas
@@ -172,10 +171,7 @@ def initKw(self, kw):
 
     def mDone(self, button):
         if button == 0:        # "OK" or double click
-            if isinstance(self.tree.selection_key, six.string_types):
-                self.key = str(self.tree.selection_key)
-            else:
-                self.key = self.tree.selection_key
+            self.key = self.tree.selection_key
             self.tree.n_expansions = 1  # save xyview in any case
         if button == 1:        # "Solid color..."
             try:
@@ -201,7 +197,7 @@ def updatePreview(self, key):
             return
         canvas = self.preview.canvas
         canvas.deleteAllItems()
-        if isinstance(key, six.string_types):
+        if isinstance(key, str):
             # solid color
             canvas.config(bg=key)
             canvas.setTile(None)
diff --git a/pysollib/tk/statusbar.py b/pysollib/tk/statusbar.py
index 6d9b6ea0a..89cef5fbd 100644
--- a/pysollib/tk/statusbar.py
+++ b/pysollib/tk/statusbar.py
@@ -27,7 +27,6 @@
 from pysollib.mygettext import _
 from pysollib.settings import WIN_SYSTEM
 
-import six
 from six.moves import tkinter
 
 from .tkwidget import MfxTooltip
@@ -96,7 +95,7 @@ def _createLabel(self, name, expand=False, width=0, tooltip=None):
     def updateText(self, **kw):
         for k, v in kw.items():
             label = getattr(self, k + '_label')
-            text = six.text_type(v)
+            text = str(v)
             width = label['width']
             if width and len(text) > width:
                 label['width'] = len(text)
diff --git a/pysollib/tk/tkwidget.py b/pysollib/tk/tkwidget.py
index c8cb34ee0..228db91fa 100644
--- a/pysollib/tk/tkwidget.py
+++ b/pysollib/tk/tkwidget.py
@@ -32,7 +32,6 @@
 from pysollib.ui.tktile.tkutil import bind, unbind_destroy
 from pysollib.ui.tktile.tkutil import makeToplevel, setTransient
 
-import six
 from six.moves import tkinter
 from six.moves import tkinter_font
 
@@ -130,7 +129,7 @@ def mDone(self, button):
 
     def altKeyEvent(self, event):
         key = event.char
-        key = six.text_type(key, 'utf-8')
+        key = str(key, 'utf-8')
         key = key.lower()
         button = self.accel_keys.get(key)
         if button is not None:
@@ -285,7 +284,7 @@ def __init__(self, parent, ex, title="Error", **kw):
                 (ex.errno, ex.strerror, repr(ex.filename))
         else:
             t = str(ex)
-        kw.text = text + six.text_type(t, errors='replace')
+        kw.text = text + str(t, errors='replace')
         MfxMessageDialog.__init__(self, parent, title, **kw.getKw())
 
 
diff --git a/pysollib/tk/wizarddialog.py b/pysollib/tk/wizarddialog.py
index 24baa8556..891caeb3f 100644
--- a/pysollib/tk/wizarddialog.py
+++ b/pysollib/tk/wizarddialog.py
@@ -26,7 +26,6 @@
 from pysollib.wizardpresets import presets
 from pysollib.wizardutil import WizardWidgets
 
-import six
 from six.moves import tkinter
 
 from .tabpage import TabPageSet
@@ -48,7 +47,7 @@ def __init__(self, parent, title, app, **kw):
         notebook.pack(expand=True, fill='both')
 
         for w in WizardWidgets:
-            if isinstance(w, six.string_types):
+            if isinstance(w, str):
                 notebook.AddPage(w)
                 frame = tkinter.Frame(notebook.pages[w]['page'])
                 frame.pack(expand=True, fill='both', padx=2, pady=4)
@@ -117,7 +116,7 @@ def presetSelected(self, v, w):
         n = w.translation_map[v]
         p = presets[n]
         for w in WizardWidgets:
-            if isinstance(w, six.string_types):
+            if isinstance(w, str):
                 continue
             if w.var_name in p:
                 v = p[w.var_name]
diff --git a/pysollib/util.py b/pysollib/util.py
index 048a43fec..738415449 100644
--- a/pysollib/util.py
+++ b/pysollib/util.py
@@ -37,8 +37,6 @@ def __init__(self):
 from pysollib.mygettext import _
 from pysollib.settings import DATA_DIRS, TOOLKIT
 
-import six
-
 # ************************************************************************
 # * constants
 # ************************************************************************
@@ -152,8 +150,8 @@ def __init__(self, argv0, filenames, path=[]):
     def __findFile(self, func, filename, subdirs=None, do_raise=1):
         if subdirs is None:
             subdirs = ("",)
-        elif isinstance(subdirs, six.string_types):
-            subdirs = (str(subdirs),)
+        elif isinstance(subdirs, str):
+            subdirs = (subdirs,)
         for dir in subdirs:
             f = os.path.join(self.dir, dir, filename)
             f = os.path.normpath(f)
diff --git a/pysollib/wizardutil.py b/pysollib/wizardutil.py
index 9d9ff7bde..a8de420ee 100644
--- a/pysollib/wizardutil.py
+++ b/pysollib/wizardutil.py
@@ -66,8 +66,6 @@
 from pysollib.util import ACE, ANY_RANK, KING, NO_RANK, UNLIMITED_MOVES
 from pysollib.wizardpresets import presets
 
-import six
-
 # ************************************************************************
 # *
 # ************************************************************************
@@ -436,7 +434,7 @@ class MyCustomGame(CustomGame):
 ''')
 
         for w in WizardWidgets:
-            if isinstance(w, six.string_types):
+            if isinstance(w, str):
                 continue
             v = w.variable.get()
             if w.widget in ('menu', 'preset'):
@@ -455,7 +453,7 @@ class MyCustomGame(CustomGame):
                     v = v.replace("\r", "\\r")
                     v = v.replace("\t", "\\t")
                     # See: https://github.com/shlomif/PySolFC/issues/177
-                    # if isinstance(v, six.text_type):
+                    # if isinstance(v, str):
                     #     v = v.encode('utf-8')
                     if not v:
                         v = 'Invalid Game Name'
@@ -481,7 +479,7 @@ def delete_game(game):
 
 def reset_wizard(game):
     for w in WizardWidgets:
-        if isinstance(w, six.string_types):
+        if isinstance(w, str):
             continue
         if game is None:
             # set to default
diff --git a/scripts/all_games.py b/scripts/all_games.py
index 94cb8dd3b..2f1ef0088 100755
--- a/scripts/all_games.py
+++ b/scripts/all_games.py
@@ -2,6 +2,7 @@
 # -*- mode: python; coding: koi8-r; -*-
 #
 
+import builtins
 import os
 import sys
 import time
@@ -16,7 +17,6 @@
 from pysollib.mygettext import fix_gettext
 from pysollib.resource import CSI
 
-from six.moves import builtins
 os.environ['LANG'] = 'C'
 builtins.__dict__['_'] = lambda x: x
 builtins.__dict__['n_'] = lambda x: x