diff --git a/.gitignore b/.gitignore
index b1cbe4b..875a53c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,8 +5,8 @@ __pycache__/
 # C extensions
 *.so
 
-# MyPy cache
-.mypy_cache/
+# mypy cache
+.mypy_cache
 
 # Distribution / packaging
 .Python
diff --git a/ci/conda-recipe/meta.yaml b/ci/conda-recipe/meta.yaml
index e95f04c..8eb1768 100644
--- a/ci/conda-recipe/meta.yaml
+++ b/ci/conda-recipe/meta.yaml
@@ -25,9 +25,6 @@ requirements:
     - fasteners
     - sphinx
     - sphinx_rtd_theme
-    # HACK: Should be removed when https://github.com/ipython/ipykernel/pull/489
-    # is implemented
-    - jupyter_client <6.0.0
 
 test:
   imports:
diff --git a/docs/conf.py b/docs/conf.py
index d97e6dd..c529c88 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -69,7 +69,11 @@
 # The master toctree document.
 master_doc = 'index'
 
-autodoc_default_flags = ['show_inheritance', 'autosummary']
+autodoc_default_options = {
+    'show_inheritance': True,
+    'autosummary': True,
+}
+
 autoclass_content = 'both'
 
 not_document_data = ['psyplot_gui.config.rcsetup.defaultParams',
@@ -78,7 +82,7 @@
 ipython_savefig_dir = os.path.join(os.path.dirname(__file__), '_static')
 
 # General information about the project.
-project = 'psyplot_gui'
+project = 'psyplot-gui'
 copyright = psyplot_gui.__copyright__
 author = psyplot_gui.__author__
 
@@ -87,7 +91,7 @@
 # built documents.
 #
 # The short X.Y version.
-version = re.match('\d+\.\d+\.\d+', psyplot_gui.__version__).group()
+version = re.match(r'\d+\.\d+\.\d+', psyplot_gui.__version__).group()
 # The full version, including alpha/beta/rc tags.
 release = psyplot_gui.__version__
 
@@ -140,7 +144,7 @@
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-  (master_doc, 'psyplot_gui.tex', u'psyplot GUI Documentation',
+  (master_doc, 'psyplot-gui.tex', u'psyplot GUI Documentation',
    author, 'manual'),
 ]
 
@@ -149,7 +153,7 @@
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'psyplot_gui', u'psyplot GUI Documentation',
+    (master_doc, 'psyplot-gui', u'psyplot GUI Documentation',
      [author], 1)
 ]
 
@@ -159,8 +163,8 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  (master_doc, 'psyplot_gui', 'psyplot GUI Documentation',
-   author, 'psyplot_gui', 'Graphical user interface for the psyplot package',
+  (master_doc, 'psyplot-gui', u'psyplot GUI Documentation',
+   author, 'psyplot-gui', 'Graphical user interface for the psyplot package',
    'Visualization'),
 ]
 
diff --git a/psyplot_gui/help_explorer.py b/psyplot_gui/help_explorer.py
index 80f51a7..8d2c719 100644
--- a/psyplot_gui/help_explorer.py
+++ b/psyplot_gui/help_explorer.py
@@ -27,7 +27,7 @@
 from tempfile import mkdtemp
 try:
     from sphinx.application import Sphinx
-    from sphinx.util import get_module_source
+    from sphinx.pycode import ModuleAnalyzer
     try:
         from psyplot.sphinxext.extended_napoleon import (
             ExtendedNumpyDocstring as NumpyDocstring,
@@ -740,7 +740,7 @@ def is_importable(self, modname):
         bool
             True if sphinx can import the module"""
         try:
-            get_module_source(modname)
+            ModuleAnalyzer.get_module_source(modname)
             return True
         except Exception:
             return False
diff --git a/psyplot_gui/main.py b/psyplot_gui/main.py
index 0b83ad1..35c3789 100644
--- a/psyplot_gui/main.py
+++ b/psyplot_gui/main.py
@@ -788,7 +788,9 @@ def edit_preferences(self, exec_=None):
             widget = PrefPageClass(dlg)
             widget.initialize()
             dlg.add_page(widget)
-        available_width = 0.667 * QDesktopWidget().availableGeometry().width()
+        available_width = int(
+            0.667*QDesktopWidget().availableGeometry().width()
+        )
         width = dlg.sizeHint().width()
         height = dlg.sizeHint().height()
         # The preferences window should cover at least one third of the screen
diff --git a/psyplot_gui/sphinx_supp/conf.py b/psyplot_gui/sphinx_supp/conf.py
index 7fcbd70..f9d2d8a 100755
--- a/psyplot_gui/sphinx_supp/conf.py
+++ b/psyplot_gui/sphinx_supp/conf.py
@@ -44,7 +44,9 @@
     extensions.append('sphinx.ext.intersphinx')
 del use_intersphinx
 
-autodoc_default_flags = ['show_inheritance']
+autodoc_default_options = {
+    'show_inheritance': True
+}
 
 try:
     import autodocsumm
@@ -52,7 +54,7 @@
     pass
 else:
     extensions.append('autodocsumm')
-    autodoc_default_flags.append('autosummary')
+    autodoc_default_options['autosummary'] = True
     not_document_data = ['psyplot.config.rcsetup.defaultParams',
                          'psyplot.config.rcsetup.rcParams']
 
@@ -74,16 +76,16 @@
 autoclass_content = 'both'
 
 # General information about the project.
-project = u'Help'
-copyright = u'2016, Philipp Sommer'
-author = u'Philipp Sommer'
+project = 'psyplot Help'
+copyright = psyplot_gui.__copyright__
+author = psyplot_gui.__author__
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = re.match('\d+\.\d+\.\d+', psyplot_gui.__version__).group()
+version = re.match(r'\d+\.\d+\.\d+', psyplot_gui.__version__).group()
 # The full version, including alpha/beta/rc tags.
 release = psyplot_gui.__version__
 #
diff --git a/setup.py b/setup.py
index 5ae13f1..a5d33be 100644
--- a/setup.py
+++ b/setup.py
@@ -58,7 +58,7 @@ def run_tests(self):
           'psyplot>=1.3.0',
           'qtconsole',
           'fasteners',
-          'sphinx',
+          'sphinx>=2.4.0',
           'sphinx_rtd_theme',
       ],
       package_data={'psyplot_gui': [
diff --git a/tests/test_console.py b/tests/test_console.py
index b0a532a..22dccf9 100644
--- a/tests/test_console.py
+++ b/tests/test_console.py
@@ -56,7 +56,7 @@ def _test_object_docu(self, symbol):
         self.insert_text('object')
         QTest.keyClicks(c._control, symbol)
         sig = '' if six.PY2 else re.sub(
-            '^\(\s*self,\s*', '(', str(signature(object.__init__)))
+            r'^\(\s*self,\s*', '(', str(signature(object.__init__)))
         header = "object" + sig
         bars = '=' * len(header)
         self.assertEqual(
diff --git a/tests/test_dataframeeditor.py b/tests/test_dataframeeditor.py
index f67cbae..af45f00 100644
--- a/tests/test_dataframeeditor.py
+++ b/tests/test_dataframeeditor.py
@@ -6,7 +6,7 @@
 import numpy as np
 import _base_testing as bt
 import unittest
-from pandas.util.testing import assert_frame_equal
+from pandas.testing import assert_frame_equal
 from psyplot_gui.compat.qtcompat import Qt, QApplication
 
 
diff --git a/tests/test_plot_creator.py b/tests/test_plot_creator.py
index c53dc43..18f4ddc 100644
--- a/tests/test_plot_creator.py
+++ b/tests/test_plot_creator.py
@@ -12,6 +12,20 @@
     asstring)
 
 
+def get_col_num(ax):
+    try:
+        return ax.get_subplotspec().colspan.start
+    except AttributeError:  # matplotlib<3.2
+        return ax.colNum
+
+
+def get_row_num(ax):
+    try:
+        return ax.get_subplotspec().rowspan.start
+    except AttributeError:  # matplotlib<3.2
+        return ax.rowNum
+
+
 class PlotCreatorTest(bt.PsyPlotGuiTestCase):
     """Tests concerning the plot creator"""
 
@@ -147,8 +161,8 @@ def test_add_subplots(self):
         self.assertEqual([ax.numRows for ax in axes], [2] * nvar)
         rows = [0, 0, 1] * nfigs
         cols = [0, 1, 0] * nfigs
-        self.assertEqual([ax.rowNum for ax in axes], rows)
-        self.assertEqual([ax.colNum for ax in axes], cols)
+        self.assertEqual([get_row_num(ax) for ax in axes], rows)
+        self.assertEqual([get_col_num(ax) for ax in axes], cols)
         fig_nums = list(chain(*([i] * 3 for i in range(1, nfigs + 1))))
         self.assertEqual([ax.get_figure().number for ax in axes], fig_nums)
         plt.close('all')
@@ -170,8 +184,8 @@ def test_add_single_subplots(self):
         # test rows, cols and figure numbers
         self.assertEqual([ax.numCols for ax in axes], [2] * nvar)
         self.assertEqual([ax.numRows for ax in axes], [2] * nvar)
-        self.assertEqual([ax.rowNum for ax in axes], [0] * nvar)
-        self.assertEqual([ax.colNum for ax in axes], [1] * nvar)
+        self.assertEqual([get_row_num(ax) for ax in axes], [0] * nvar)
+        self.assertEqual([get_col_num(ax) for ax in axes], [1] * nvar)
         self.assertEqual([ax.get_figure().number for ax in axes], list(
             range(1, nvar + 1)))
         plt.close('all')
@@ -203,8 +217,8 @@ def test_axescreator_subplots(self):
         # test rows, cols and figure numbers
         self.assertEqual([ax.numCols for ax in axes], [2] * nvar)
         self.assertEqual([ax.numRows for ax in axes], [2] * nvar)
-        self.assertEqual([ax.rowNum for ax in axes], [0] * nvar)
-        self.assertEqual([ax.colNum for ax in axes], [1] * nvar)
+        self.assertEqual([get_row_num(ax) for ax in axes], [0] * nvar)
+        self.assertEqual([get_col_num(ax) for ax in axes], [1] * nvar)
         self.assertEqual([ax.get_figure().number for ax in axes], list(
             range(1, nvar + 1)))
         # close figures