diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 66316fe..b6fcaba 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,11 @@
 Changelog
 ---------
 
+v4.2 (??? 2024)
+    * Made ``ncvue`` work with newer matplotlib versions, updating
+      colormaps and using matplotlib.pyplot.style 'seaborn-v0_8-dark'.
+    * Made ``ncvue`` work with newer Tcl/Tk versions (ttk.Style.theme_use).
+
 v4.1.2 (Jun 2022)
     * Made ``ncvue`` a gui_script entry_point, so it can be called by
       `python -m ncvue`.
diff --git a/src/ncvue/images/Greys.png b/src/ncvue/images/Greys.png
index 67e401a..1a78235 100644
Binary files a/src/ncvue/images/Greys.png and b/src/ncvue/images/Greys.png differ
diff --git a/src/ncvue/images/gist_gray.png b/src/ncvue/images/gist_gray.png
index 93abbbb..4db94fa 100644
Binary files a/src/ncvue/images/gist_gray.png and b/src/ncvue/images/gist_gray.png differ
diff --git a/src/ncvue/images/gray.png b/src/ncvue/images/gray.png
index 93abbbb..4db94fa 100644
Binary files a/src/ncvue/images/gray.png and b/src/ncvue/images/gray.png differ
diff --git a/src/ncvue/images/plot_png_colormaps.py b/src/ncvue/images/plot_png_colormaps.py
index 1d6db49..2462447 100644
--- a/src/ncvue/images/plot_png_colormaps.py
+++ b/src/ncvue/images/plot_png_colormaps.py
@@ -14,7 +14,10 @@
 # from matplotlib.backends.backend_pdf import PdfPages
 # matplotlib.rc('ps', usedistiller='xpdf')  # ps2pdf
 from matplotlib import pyplot as plt
-plt.style.use('seaborn-darkgrid')
+try:
+    plt.style.use('seaborn-v0_8-darkgrid')
+except OSError:
+    plt.style.use('seaborn-darkgrid')
 
 if __name__ == "__main__":
 
diff --git a/src/ncvue/ncvcontour.py b/src/ncvue/ncvcontour.py
index 7ec2510..a703512 100644
--- a/src/ncvue/ncvcontour.py
+++ b/src/ncvue/ncvcontour.py
@@ -47,8 +47,12 @@
 import matplotlib
 # matplotlib.use('TkAgg')
 from matplotlib import pyplot as plt
-# plt.style.use('seaborn-darkgrid')
-plt.style.use('seaborn-dark')
+try:
+    # plt.style.use('seaborn-v0_8-darkgrid')
+    plt.style.use('seaborn-v0_8-dark')
+except OSError:
+    # plt.style.use('seaborn-darkgrid')
+    plt.style.use('seaborn-dark')
 # plt.style.use('fast')
 
 
diff --git a/src/ncvue/ncvmap.py b/src/ncvue/ncvmap.py
index 7f11da5..ea69ca0 100644
--- a/src/ncvue/ncvmap.py
+++ b/src/ncvue/ncvmap.py
@@ -51,8 +51,12 @@
 import matplotlib as mpl
 # mpl.use('TkAgg')
 from matplotlib import pyplot as plt
-# plt.style.use('seaborn-darkgrid')
-plt.style.use('seaborn-dark')
+try:
+    # plt.style.use('seaborn-v0_8-darkgrid')
+    plt.style.use('seaborn-v0_8-dark')
+except OSError:
+    # plt.style.use('seaborn-darkgrid')
+    plt.style.use('seaborn-dark')
 # plt.style.use('fast')
 import cartopy.crs as ccrs
 
diff --git a/src/ncvue/ncvscatter.py b/src/ncvue/ncvscatter.py
index ab653a2..dc896f5 100644
--- a/src/ncvue/ncvscatter.py
+++ b/src/ncvue/ncvscatter.py
@@ -48,8 +48,12 @@
 import matplotlib
 # matplotlib.use('TkAgg')
 from matplotlib import pyplot as plt
-# plt.style.use('seaborn-darkgrid')
-plt.style.use('seaborn-dark')
+try:
+    # plt.style.use('seaborn-v0_8-darkgrid')
+    plt.style.use('seaborn-v0_8-dark')
+except OSError:
+    # plt.style.use('seaborn-darkgrid')
+    plt.style.use('seaborn-dark')
 # plt.style.use('fast')
 
 
diff --git a/src/ncvue/ncvue.py b/src/ncvue/ncvue.py
index 31d5346..2de2cb6 100644
--- a/src/ncvue/ncvue.py
+++ b/src/ncvue/ncvue.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
 Calling routine of ncvue.
 
@@ -29,7 +29,6 @@
     * Font size 13 on Windows for plots, Jun 2021, Matthias Cuntz
 
 """
-from __future__ import absolute_import, division, print_function
 import sys
 import tkinter as tk
 try:
@@ -43,8 +42,8 @@
 import netCDF4 as nc
 from .ncvmethods import analyse_netcdf
 from .ncvmain import ncvMain
-import matplotlib as mpl
-mpl.use('TkAgg')
+# import matplotlib as mpl
+# mpl.use('TkAgg')
 from matplotlib import pyplot as plt
 
 
@@ -65,6 +64,7 @@ def ncvue(ncfile='', miss=np.nan):
         netcdf4.default_fillvals (default: np.nan).
 
     """
+    # print(mpl.get_backend())
     ios = platform.system()  # Windows, Darwin, Linux
     if ios == 'Windows':
         # make Windows aware of high resolution displays
@@ -88,7 +88,10 @@ def ncvue(ncfile='', miss=np.nan):
     if ios == 'Darwin':
         theme = 'aqua'
         style = ttk.Style()
-        style.theme_use(theme)
+        try:
+            style.theme_use(theme)
+        except:
+            pass
     elif ios == 'Windows':
         top.option_add("*Font", "Helvetica 10")
         plt.rc('font', size=13)