diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index edd8614f..1459ef20 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -15,16 +15,16 @@ jobs:
     strategy:
       matrix:
         host-os: ["ubuntu-latest", "macos-latest", "windows-latest"]
-        python-version: ["3.8", "3.9", "3.10"]
-        numpy-version: ["1.21"]
-        pyqt-version: ["5.12"]
+        python-version: ["3.9", "3.10", "3.11"]
+        numpy-version: ["1.24"]
+        pyqt-version: ["5.15"]
         include:
           - host-os: "ubuntu-latest"
             conda-mamba: "mamba"
           - host-os: "macos-latest"
             conda-mamba: "mamba"
           - host-os: "windows-latest"
-            conda-mamba: "conda"
+            conda-mamba: "mamba"
       fail-fast: false
 
     runs-on: ${{ matrix.host-os }}
@@ -52,6 +52,8 @@ jobs:
 
     - uses: conda-incubator/setup-miniconda@v2
       with:
+        # miniforge-variant: Mambaforge
+        miniforge-version: latest
         channels: conda-forge
         channel-priority: flexible
         auto-update-conda: true
@@ -83,7 +85,7 @@ jobs:
       run: |
         set -vxeo pipefail
 
-        conda install mamba -n base -c conda-forge
+        # conda install -y -n base --override-channels -c conda-forge mamba 'python_abi=*=*cp*'
 
         ${{ matrix.conda-mamba }} install -y \
           python=${{ matrix.python-version }} \
diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index af3622db..2a7c6cfe 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -2,46 +2,49 @@
 Installation
 ============
 
-PyXRF is supported for Python 3.7-3.10 in Linux/Mac/Windows systems.
+PyXRF is supported for Python 3.9-3.11 in Linux/Mac/Windows systems.
 The easiest way to install PyXRF is to load it into a Conda environment from
 ``conda-forge`` Anaconda channel. Installation instructions are
 identical for all supported OS.
 
 .. note::
 
-  **Installation on Windows**: PyXRF can be installed from *conda-forge* only in the environments
-  with Python 3.9 and older. Python 3.10 and 3.11 (latest and default) are currently
-  not supported. If there is no existing Conda installation, download and
-  install *Miniconda3*, choose the option to add *Miniconda3* to system PATH when asked,
-  then run the following commands (replace the environment name `pyxrf-env` with
-  any convenient name if necessary):
+  **Installation on Windows**: Since *Conda* does not behave very well recently,
+  use *Mamba* to install PyXRF from *conda-forge* channel (see the *Mamba* installation
+  notes below). For example, the following sequence of commands creates
+  a new environment named ``pyxrf-env`` with Python 3.10 and installs PyXRF into
+  the environment. Skip the ``mamba create`` command to install PyXRF into
+  an existing environment.
 
   .. code:: bash
 
-    $ conda create -n pyxrf-env python=3.9 pip -c conda-forge
-    $ conda activate pyxrf-env
-    $ conda install pyxrf -c conda-forge
-
+    $ mamba create -n pyxrf-env python=3.10 pip -c conda-forge
+    $ mamba activate pyxrf-env
+    $ mamba install pyxrf -c conda-forge
 
 .. note::
 
-  If you experience problems using `conda`, in particular if `conda` gets stuck trying to resolve
-  the environment, you may try using `mamba`, which is designed as a drop-in replacement for
-  `conda`. Once you install *Miniconda* or *Anaconda*, install `mamba` in the base environment:
+  If you experience problems using *Conda*, in particular if *Conda* gets stuck trying to resolve
+  the environment, use *Mamba*, which is designed as a drop-in replacement for *Conda*.
+  *Mamba* is included in the `Miniforge distribution <https://github.com/conda-forge/miniforge>`_.
+  It can also be installed in the base environment of an existing installation of *Miniconda*
+  or *Anaconda*:
 
   .. code:: bash
 
-    $ conda install mamba -n base -c conda-forge
+    $ conda install -n base --override-channels -c conda-forge mamba 'python_abi=*=*cp*'
+
+  See `Mamba installation instructions <https://mamba.readthedocs.io/en/latest/mamba-installation.html#mamba-install>`_
+  for more details.
 
-  Then use `mamba` instead of `conda` in all the following commands, for example
+  **How to use `mamba`:** Simply replace ``conda`` with ``mamba`` when you create an environment,
+  install or remove packages, etc. For example
 
   .. code:: bash
 
-    $ mamba create -n pyxrf-env python=3.9 pip -c conda-forge
     $ mamba activate pyxrf-env
     $ mamba install pyxrf -c conda-forge
 
-  You may still use `conda` where it works well, e.g. to activate an existing environment.
 
 1. Install `Miniconda3 <http://conda.pydata.org/miniconda.html>`_  or
    `Anaconda <https://www.anaconda.com/distribution>`_. Select the latest version.