diff --git a/pyproject.toml b/pyproject.toml
index 80f48b102..e85ddf992 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools <= 60", "future", "Cython", "wheel", "numpy", "gitpython", "dill"]
+requires = ["setuptools <= 60", "Cython", "wheel", "numpy", "gitpython", "dill"]
 build-backend = "setuptools.build_meta"
 
 
diff --git a/requirements.txt b/requirements.txt
index 5061d2e56..8c61a5d7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,41 +1,22 @@
-
 # Requirements to install anuga in read the docs
 
-# setuptools
-# wheel
-# pytest
-# numpy
-# scipy
-# netcdf4
-# matplotlib
-# dill
-# cython
-# future
-# Pmw
-# meshpy
-# pymetis
-# gitpython
-# pytz
-# utm
-# nbsphinx
-
-cython >= 0.29
+cython
 pybind11
-dill >= 0.3
-future >= 0.18
-gitpython >= 3.1
-matplotlib >= 3.5
-meshpy >= 2020.1
-nbsphinx >= 0.8
-netcdf4 >= 1.5
-numpy >= 1.21
-Pmw >=  2.0.1
-pymetis >=  2020.1
-pytest >= 7.1.2
-pytz >= 2022.1
-scipy >= 1.7
-setuptools >=  62.3
-sphinx >= 5.0.1
-utm >= 0.7.0
-wheel >= 0.37
+dill
+future
+gitpython
+matplotlib
+meshpy
+nbsphinx
+netcdf4
+numpy
+Pmw
+pymetis
+pytest
+pytz
+scipy
+setuptools
+sphinx
+utm
+wheel
 
diff --git a/setup.py b/setup.py
index 7d13e4773..ab7854348 100644
--- a/setup.py
+++ b/setup.py
@@ -139,6 +139,7 @@ def setup_package():
                                  'Programming Language :: Python :: 3.8',
                                  'Programming Language :: Python :: 3.9',
                                  'Programming Language :: Python :: 3.10',
+                                 'Programming Language :: Python :: 3.11',
                                  ],
                     cmdclass={'clean': CleanCommand},
                     **extra_setuptools_args)
diff --git a/validation_tests/analytical_exact/dam_break_dry/numerical_dam_break_dry.py b/validation_tests/analytical_exact/dam_break_dry/numerical_dam_break_dry.py
index f86028be7..2fe18da08 100644
--- a/validation_tests/analytical_exact/dam_break_dry/numerical_dam_break_dry.py
+++ b/validation_tests/analytical_exact/dam_break_dry/numerical_dam_break_dry.py
@@ -7,7 +7,7 @@
 #------------------------------------------------------------------------------
 import anuga
 from anuga import Domain as Domain
-from numpy import zeros, float
+from numpy import zeros
 from anuga import myid, finalize, distribute
 
 
diff --git a/validation_tests/analytical_exact/dam_break_wet/numerical_dam_break_wet.py b/validation_tests/analytical_exact/dam_break_wet/numerical_dam_break_wet.py
index eabad68d2..fe069bfb9 100644
--- a/validation_tests/analytical_exact/dam_break_wet/numerical_dam_break_wet.py
+++ b/validation_tests/analytical_exact/dam_break_wet/numerical_dam_break_wet.py
@@ -13,7 +13,7 @@
 from anuga import myid, finalize, distribute
 
 from math import cos
-from numpy import zeros, float
+from numpy import zeros
 from time import localtime, strftime, gmtime