diff --git a/README.rst b/README.rst
index 98909b690a9239fbf0077e4ecc688522b8811a83..2e903e2464b7ad07aa086d41b1fc81ed2200966b 100644
--- a/README.rst
+++ b/README.rst
@@ -42,7 +42,7 @@ A quick setup would be:
 
 1. ``source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate``
 2. ``git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git && cd pycalibration`` - clone the offline calibration package from EuXFEL GitLab
-3. ``pyenv shell 3.8.11`` - load required version of python
+3. ``pyenv shell 3.8.18`` - load required version of python
 4. ``python3 -m venv .venv`` - create the virtual environment
 5. ``source .venv/bin/activate`` - activate the virtual environment
 6. ``python3 -m pip install --upgrade pip`` - upgrade version of pip
@@ -55,7 +55,7 @@ Copy/paste script:
   source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate
   git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git
   cd pycalibration
-  pyenv shell 3.8.11
+  pyenv shell 3.8.18
   python3 -m venv .venv
   source .venv/bin/activate
   python3 -m pip install --upgrade pip
@@ -73,7 +73,7 @@ installation method instead.
 
 1. ``source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate``
 2. ``git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git && cd pycalibration`` - clone the offline calibration package from EuXFEL GitLab
-3. ``pyenv shell 3.8.11`` - load required version of python
+3. ``pyenv shell 3.8.18`` - load required version of python
 4. ``pip install .`` - install the pycalibration package (add ``-e`` flag for editable development installation)
 5. ``export PATH=$HOME/.local/bin:$PATH`` - make sure that the home directory is in the PATH environment variable
 
@@ -83,7 +83,7 @@ Copy/paste script:
 
   source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate
   git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git
-  pyenv shell 3.8.11
+  pyenv shell 3.8.18
   cd pycalibration
   pip install --user .  # `-e` flag for editable install, e.g. `pip install -e .`
   export PATH=$HOME/.local/bin:$PATH
diff --git a/docs/development/installation.md b/docs/development/installation.md
index e4a4d098ea4616b22a53f149d4e76119fdb6cbc3..158b2fca26f4d24bb83157145c8a675b0b8c74f7 100644
--- a/docs/development/installation.md
+++ b/docs/development/installation.md
@@ -31,7 +31,7 @@ A quick setup would be:
 1.  `source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate`
 2.  `git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git && cd pycalibration` -
     clone the offline calibration package from EuXFEL GitLab
-3.  `pyenv shell 3.8.11` - load required version of python
+3.  `pyenv shell 3.8.18` - load required version of python
 4.  `python3 -m venv .venv` - create the virtual environment
 5.  `source .venv/bin/activate` - activate the virtual environment
 6.  `python3 -m pip install --upgrade pip` - upgrade version of pip
@@ -44,7 +44,7 @@ Copy/paste script:
 source /gpfs/exfel/sw/calsoft/.pyenv/bin/activate
 git clone ssh://git@git.xfel.eu:10022/detectors/pycalibration.git
 cd pycalibration
-pyenv shell 3.8.11
+pyenv shell 3.8.18
 python3 -m venv .venv
 source .venv/bin/activate
 python3 -m pip install --upgrade pip