diff --git a/eoxmagmod/eoxmagmod/magnetic_model/field_lines.py b/eoxmagmod/eoxmagmod/magnetic_model/field_lines.py
index 2902a8f..73ca11b 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/field_lines.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/field_lines.py
@@ -26,12 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-try:
-    # Python 2 - range as an iterator
-    from buildins import xrange as range
-except ImportError:
-    pass
-
 from numpy import asarray, copy
 from .._pymm import GEOCENTRIC_CARTESIAN, GEOCENTRIC_SPHERICAL, convert
 from ..util import vnorm, vrotate
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/loader_emm.py b/eoxmagmod/eoxmagmod/magnetic_model/loader_emm.py
index ca993ef..990d6da 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/loader_emm.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/loader_emm.py
@@ -26,7 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-from io import open
 from .model import SphericalHarmomicGeomagneticModel
 from .coefficients import (
     SparseSHCoefficientsTimeDependentDecimalYear,
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/loader_igrf.py b/eoxmagmod/eoxmagmod/magnetic_model/loader_igrf.py
index 130c594..c9a6d57 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/loader_igrf.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/loader_igrf.py
@@ -26,7 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-from io import open
 from .model import SphericalHarmomicGeomagneticModel
 from .coefficients import SparseSHCoefficientsTimeDependentDecimalYear
 from .parser_igrf import parse_igrf_file
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/loader_mio.py b/eoxmagmod/eoxmagmod/magnetic_model/loader_mio.py
index 9a3bfb5..941170c 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/loader_mio.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/loader_mio.py
@@ -26,7 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-from io import open
 from numpy import arange
 from .model_mio import (
     DipoleMIOPrimaryGeomagneticModel, DipoleMIOGeomagneticModel,
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/loader_wmm.py b/eoxmagmod/eoxmagmod/magnetic_model/loader_wmm.py
index 860f70b..149a4e1 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/loader_wmm.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/loader_wmm.py
@@ -26,7 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-from io import open
 from .model import SphericalHarmomicGeomagneticModel
 from .coefficients import SparseSHCoefficientsTimeDependentDecimalYear
 from .parser_wmm import parse_wmm_file
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/tests/coefficients_mio.py b/eoxmagmod/eoxmagmod/magnetic_model/tests/coefficients_mio.py
index 8d9677a..27ccf8d 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/tests/coefficients_mio.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/tests/coefficients_mio.py
@@ -28,7 +28,6 @@
 # pylint: disable=missing-docstring
 
 from unittest import TestCase, main
-from io import open
 from numpy import inf, nan
 from numpy.testing import assert_allclose
 from eoxmagmod.time_util import decimal_year_to_mjd2000
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/tests/model_loaders.py b/eoxmagmod/eoxmagmod/magnetic_model/tests/model_loaders.py
index 3b2be86..d140921 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/tests/model_loaders.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/tests/model_loaders.py
@@ -27,7 +27,6 @@
 #-------------------------------------------------------------------------------
 # pylint: disable=missing-docstring,no-self-use,invalid-name,too-many-public-methods
 
-from __future__ import print_function
 from unittest import TestCase, main
 from itertools import product
 from numpy import nan, inf, isinf, array, empty, full, nditer, asarray
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/tests/util.py b/eoxmagmod/eoxmagmod/magnetic_model/tests/util.py
index 7a1c10b..0458c05 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/tests/util.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/tests/util.py
@@ -27,7 +27,6 @@
 #-------------------------------------------------------------------------------
 
 from unittest import TestCase, main
-from io import open
 from hashlib import md5
 from eoxmagmod.magnetic_model.util import parse_file
 from eoxmagmod.magnetic_model.tests.data import SWARM_MIO_SHA_2_TEST_DATA
diff --git a/eoxmagmod/eoxmagmod/magnetic_model/util.py b/eoxmagmod/eoxmagmod/magnetic_model/util.py
index c374cb6..2a54a52 100644
--- a/eoxmagmod/eoxmagmod/magnetic_model/util.py
+++ b/eoxmagmod/eoxmagmod/magnetic_model/util.py
@@ -26,8 +26,6 @@
 # THE SOFTWARE.
 #-------------------------------------------------------------------------------
 
-from io import open
-
 
 def parse_file(parser, file_, *args, **kwargs):
     if isinstance(file_, str):
diff --git a/eoxmagmod/eoxmagmod/py_common.h b/eoxmagmod/eoxmagmod/py_common.h
index 80c6210..cd42c07 100644
--- a/eoxmagmod/eoxmagmod/py_common.h
+++ b/eoxmagmod/eoxmagmod/py_common.h
@@ -34,13 +34,7 @@
 
 /* checking the Python version */
 
-#if PY_MAJOR_VERSION == 2
-  #define IS_PYTHON_2
-  #if PY_MINOR_VERSION < 6
-    #error "Non-supported Python minor version!"
-  #endif
-#elif PY_MAJOR_VERSION == 3
-  #define IS_PYTHON_3
+#if PY_MAJOR_VERSION == 3
   #if PY_MINOR_VERSION < 4
     #error "Non-supported Python minor version!"
   #endif
@@ -48,12 +42,6 @@
   #error "Non-supported Python major version!"
 #endif
 
-/* Python 2/3 compatibility */
-
-#ifdef IS_PYTHON_3
-#define PyString_FromString PyUnicode_FromString
-#endif
-
 /* Python dictionary operations */
 
 static void set_dict_item_str(PyObject *dict, const char * key, PyObject *value)
@@ -74,20 +62,14 @@ static void set_dict_item_str_double(PyObject *dict, const char * key, double va
 
 static void set_dict_item_str_str(PyObject *dict, const char * key, const char *value)
 {
-    #ifdef IS_PYTHON_2
-    set_dict_item_str(dict, key, PyString_FromString(value));
-    #else
     set_dict_item_str(dict, key, PyUnicode_FromString(value));
-    #endif
 }
 
 /* Python module initialization */
 
-#ifdef IS_PYTHON_3
 static struct PyModuleDef module_definition = {
     PyModuleDef_HEAD_INIT, NULL, NULL, -1, NULL, NULL, NULL, NULL, NULL
 };
-#endif
 
 PyObject* init_python_module(
     const char *name,
@@ -96,14 +78,10 @@ PyObject* init_python_module(
 )
 {
     PyObject *module = NULL;
-#ifdef IS_PYTHON_3
     module_definition.m_name = name;
     module_definition.m_doc = doc;
     module_definition.m_methods = methods;
     module = PyModule_Create(&module_definition);
-#else /* IS_PYTHON2 */
-    module = Py_InitModule3(name, methods, doc);
-#endif
     return module;
 }
 
diff --git a/eoxmagmod/eoxmagmod/pymm.c b/eoxmagmod/eoxmagmod/pymm.c
index 6d04cfe..e83f786 100644
--- a/eoxmagmod/eoxmagmod/pymm.c
+++ b/eoxmagmod/eoxmagmod/pymm.c
@@ -5,7 +5,7 @@
  * Author: Martin Paces <martin.paces@eox.at>
  *
  *-----------------------------------------------------------------------------
- * Copyright (C) 2014 EOX IT Services GmbH
+ * Copyright (C) 2014-2022 EOX IT Services GmbH
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -113,7 +113,7 @@ static PyObject* init_module(void)
 
     /* module metadata */
     set_dict_item_str_str(dict, "__author__", "Martin Paces (martin.paces@eox.at)");
-    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2014 EOX IT Services GmbH");
+    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2014-2022 EOX IT Services GmbH");
     set_dict_item_str_str(dict, "__licence__", "EOX licence (MIT style)");
     set_dict_item_str_str(dict, "__version__", VERSION);
 
@@ -121,20 +121,10 @@ static PyObject* init_module(void)
     return module;
 }
 
-#if PY_MAJOR_VERSION == 2
-
-PyMODINIT_FUNC init_pymm(void)
-{
-    import_array();
-    init_module();
-}
-
-#else
+/*---------------------------------------------------------------------------*/
 
 PyObject* PyInit__pymm(void)
 {
     import_array();
     return init_module();
 }
-
-#endif
diff --git a/eoxmagmod/eoxmagmod/pyqd.c b/eoxmagmod/eoxmagmod/pyqd.c
index fb01494..98dbad0 100644
--- a/eoxmagmod/eoxmagmod/pyqd.c
+++ b/eoxmagmod/eoxmagmod/pyqd.c
@@ -5,7 +5,7 @@
  * Author: Martin Paces <martin.paces@eox.at>
  *
  *-----------------------------------------------------------------------------
- * Copyright (C) 2015 EOX IT Services GmbH
+ * Copyright (C) 2015-2022 EOX IT Services GmbH
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -80,7 +80,7 @@ static PyObject* init_module(void)
 
     /* metadata */
     set_dict_item_str_str(dict, "__author__", "Martin Paces (martin.paces@eox.at)");
-    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2015 EOX IT Services GmbH");
+    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2015-2022 EOX IT Services GmbH");
     set_dict_item_str_str(dict, "__licence__", "EOX licence (MIT style)");
     set_dict_item_str_str(dict, "__version__", VERSION);
 
@@ -90,20 +90,8 @@ static PyObject* init_module(void)
 
 /*---------------------------------------------------------------------------*/
 
-#if PY_MAJOR_VERSION == 2
-
-PyMODINIT_FUNC init_pyqd(void)
-{
-    import_array();
-    init_module();
-}
-
-#else
-
 PyObject* PyInit__pyqd(void)
 {
     import_array();
     return init_module();
 }
-
-#endif
diff --git a/eoxmagmod/eoxmagmod/pysunpos.c b/eoxmagmod/eoxmagmod/pysunpos.c
index ff1508d..f84ffde 100644
--- a/eoxmagmod/eoxmagmod/pysunpos.c
+++ b/eoxmagmod/eoxmagmod/pysunpos.c
@@ -5,7 +5,7 @@
  * Author: Martin Paces <martin.paces@eox.at>
  *
  *-----------------------------------------------------------------------------
- * Copyright (C) 2017 EOX IT Services GmbH
+ * Copyright (C) 2017-2022 EOX IT Services GmbH
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -70,7 +70,7 @@ static PyObject* init_module(void)
 
     /* module metadata */
     set_dict_item_str_str(dict, "__author__", "Martin Paces (martin.paces@eox.at)");
-    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2017 EOX IT Services GmbH");
+    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2017-2022 EOX IT Services GmbH");
     set_dict_item_str_str(dict, "__licence__", "EOX licence (MIT style)");
     set_dict_item_str_str(dict, "__version__", VERSION);
 
@@ -78,20 +78,10 @@ static PyObject* init_module(void)
     return module;
 }
 
-#if PY_MAJOR_VERSION == 2
-
-PyMODINIT_FUNC init_pysunpos(void)
-{
-    import_array();
-    init_module();
-}
-
-#else
+/*---------------------------------------------------------------------------*/
 
 PyObject* PyInit__pysunpos(void)
 {
     import_array();
     return init_module();
 }
-
-#endif
diff --git a/eoxmagmod/eoxmagmod/pytimeconv.c b/eoxmagmod/eoxmagmod/pytimeconv.c
index 84c92bd..78003a8 100644
--- a/eoxmagmod/eoxmagmod/pytimeconv.c
+++ b/eoxmagmod/eoxmagmod/pytimeconv.c
@@ -5,7 +5,7 @@
  * Author: Martin Paces <martin.paces@eox.at>
  *
  *-----------------------------------------------------------------------------
- * Copyright (C) 2018 EOX IT Services GmbH
+ * Copyright (C) 2018-2022 EOX IT Services GmbH
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -73,7 +73,7 @@ static PyObject* init_module(void)
 
     /* metadata */
     set_dict_item_str_str(dict, "__author__", "Martin Paces (martin.paces@eox.at)");
-    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2018 EOX IT Services GmbH");
+    set_dict_item_str_str(dict, "__copyright__", "Copyright (C) 2018-2022 EOX IT Services GmbH");
     set_dict_item_str_str(dict, "__licence__", "EOX licence (MIT style)");
     set_dict_item_str_str(dict, "__version__", VERSION);
 
@@ -81,20 +81,10 @@ static PyObject* init_module(void)
     return module;
 }
 
-#if PY_MAJOR_VERSION == 2
-
-PyMODINIT_FUNC init_pytimeconv(void)
-{
-    import_array();
-    init_module();
-}
-
-#else
+/*---------------------------------------------------------------------------*/
 
 PyObject* PyInit__pytimeconv(void)
 {
     import_array();
     return init_module();
 }
-
-#endif
diff --git a/eoxmagmod/eoxmagmod/tests/data/generate_quasi_dipole_test_data.py b/eoxmagmod/eoxmagmod/tests/data/generate_quasi_dipole_test_data.py
index 70257e6..145b35d 100644
--- a/eoxmagmod/eoxmagmod/tests/data/generate_quasi_dipole_test_data.py
+++ b/eoxmagmod/eoxmagmod/tests/data/generate_quasi_dipole_test_data.py
@@ -28,11 +28,6 @@
 #pylint: disable=missing-docstring
 
 import sys
-try:
-    # Python 2
-    from itertools import izip as zip
-except ImportError:
-    pass
 from itertools import product
 from numpy import array, vectorize
 from numpy.random import uniform
diff --git a/eoxmagmod/eoxmagmod/tests/data/generate_solar_position_test_data.py b/eoxmagmod/eoxmagmod/tests/data/generate_solar_position_test_data.py
index 2e4cc50..7dca391 100644
--- a/eoxmagmod/eoxmagmod/tests/data/generate_solar_position_test_data.py
+++ b/eoxmagmod/eoxmagmod/tests/data/generate_solar_position_test_data.py
@@ -28,11 +28,6 @@
 #pylint: disable=missing-docstring
 
 import sys
-try:
-    # Python 2
-    from itertools import izip as zip
-except ImportError:
-    pass
 from itertools import product
 from numpy import array
 from numpy.random import uniform
diff --git a/eoxmagmod/eoxmagmod/tests/data/update_quasi_dipole_test_data.py b/eoxmagmod/eoxmagmod/tests/data/update_quasi_dipole_test_data.py
index d62b6fa..800dd1f 100644
--- a/eoxmagmod/eoxmagmod/tests/data/update_quasi_dipole_test_data.py
+++ b/eoxmagmod/eoxmagmod/tests/data/update_quasi_dipole_test_data.py
@@ -28,11 +28,6 @@
 #pylint: disable=missing-docstring
 
 import sys
-try:
-    # Python 2
-    from itertools import izip as zip
-except ImportError:
-    pass
 from numpy import array
 from eoxmagmod import mjd2000_to_decimal_year
 from eoxmagmod.quasi_dipole_coordinates import (
diff --git a/eoxmagmod/eoxmagmod/tests/quasi_dipole_coordinates.py b/eoxmagmod/eoxmagmod/tests/quasi_dipole_coordinates.py
index a30ad20..6aefabe 100644
--- a/eoxmagmod/eoxmagmod/tests/quasi_dipole_coordinates.py
+++ b/eoxmagmod/eoxmagmod/tests/quasi_dipole_coordinates.py
@@ -28,7 +28,6 @@
 #pylint: disable=missing-docstring
 
 from unittest import TestCase, main
-from io import open
 from numpy import array
 from numpy.testing import assert_allclose
 from eoxmagmod.quasi_dipole_coordinates import (
diff --git a/eoxmagmod/eoxmagmod/tests/solar_position.py b/eoxmagmod/eoxmagmod/tests/solar_position.py
index 0757dac..75e42bd 100644
--- a/eoxmagmod/eoxmagmod/tests/solar_position.py
+++ b/eoxmagmod/eoxmagmod/tests/solar_position.py
@@ -28,7 +28,6 @@
 #pylint: disable=missing-docstring
 
 from unittest import TestCase, main
-from io import open
 from numpy import array
 from numpy.testing import assert_allclose
 from eoxmagmod.quasi_dipole_coordinates import eval_subsol
diff --git a/eoxmagmod/setup.py b/eoxmagmod/setup.py
index 91444a3..d783a3d 100644
--- a/eoxmagmod/setup.py
+++ b/eoxmagmod/setup.py
@@ -59,12 +59,11 @@
         'Operating System :: POSIX',
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: Implementation :: CPython',
         'Topic :: Scientific/Engineering :: Physics',
         'Topic :: Utilities',