diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 9b5c18e..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,53 +0,0 @@
-language: cpp  # Travis-CI does not currently support Python and Mac OS X
-
-os:
-  - linux
-  - osx
-
-env:
-  - PYTHON_VERSION=3.8
-  - PYTHON_VERSION=3.9
-  - PYTHON_VERSION=3.10
-
-matrix:
-  fast_finish: true
-  allow_failures:
-  - os: osx
-  - env: PYTHON_VERSION=3.10
-
-install:
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then MINICONDA_OS=Linux; else MINICONDA_OS=MacOSX; fi
-  - wget https://repo.anaconda.com/miniconda/Miniconda3-latest-$MINICONDA_OS-x86_64.sh -O miniconda.sh
-  - bash miniconda.sh -b -p "$HOME"/miniconda
-  - source "$HOME"/miniconda/etc/profile.d/conda.sh
-  - conda config --set always_yes yes --set changeps1 no --set auto_update_conda false --set notify_outdated_conda false
-  - conda config --add channels conda-forge
-  - conda update -q conda
-  - conda info -a
-  - conda create -q -n test-environment python=$PYTHON_VERSION
-  - conda activate test-environment
-  - python --version
-
-  - pip install coveralls PyYAML pytest pytest-cov wheel
-  # for hyo2.abc2
-  - conda install appdirs cartopy gdal matplotlib-base numpy psutil pyproj
-  - pip install PySide6
-  - pip install https://github.com/hydroffice/hyo2_abc/archive/master.zip
-  # for hyo2.soundspeed
-  - conda install gsw netCDF4 pillow pyserial scipy
-
-  # --no-deps because of pip not detecting the installed hyo2.abc2
-  - pip install --no-deps .
-  - conda list --show-channel-urls
-
-script:
-  - coverage run --source hyo2 setup.py test
-  - coverage report -m
-  - coveralls
-
-after_script:
-  - python setup.py bdist_wheel
-
-after_success:
-  - path: dist\*
-
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 303b117..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,71 +0,0 @@
-version: 2024.{build}-{branch}
-
-image: Visual Studio 2015
-
-environment:
-
-  matrix:
-
-    - PYTHON_VERSION: 3.8
-      PYTHON_ARCH: x64
-      MINICONDA: C:\Miniconda37-x64
-
-    - PYTHON_VERSION: 3.9
-      PYTHON_ARCH: x64
-      MINICONDA: C:\Miniconda37-x64
-
-    - PYTHON_VERSION: 3.10
-      PYTHON_ARCH: x64
-      MINICONDA: C:\Miniconda37-x64
-
-matrix:
-
-  allow_failures:
-
-    - PYTHON_VERSION: 3.9
-      PYTHON_ARCH: x64
-      MINICONDA: C:\Miniconda37-x64
-
-    - PYTHON_VERSION: 3.10
-      PYTHON_ARCH: x64
-      MINICONDA: C:\Miniconda37-x64
-
-install:
-  - set PATH=%MINICONDA%;%MINICONDA%\Scripts;%PATH%
-
-  # Install the build and runtime dependencies of the project.
-  - conda config --set always_yes yes --set changeps1 no
-  - conda update -q conda
-  - conda info -a
-  - conda config --add channels conda-forge
-  - conda create -q -n test-environment python=%PYTHON_VERSION%
-  - activate test-environment
-
-  # Check that we have the expected version of Python
-  - python --version
-
-  - pip install coveralls PyYAML pytest pytest-cov wheel
-  # for hyo2.abc2
-  - conda install appdirs cartopy "gdal<3.0.0" matplotlib-base numpy psutil pyproj
-  - pip install PySide6
-  # for hyo2.soundspeed
-  - conda install gsw netCDF4 pillow pyserial scipy
-  - pip install https://github.com/hydroffice/hyo2_abc/archive/master.zip
-
-build: off
-build_script:
-  # --no-deps because of pip not detecting the installed hyo2.abc2
-  - pip install --no-deps .
-  - conda list --show-channel-urls
-
-test: off
-test_script:
-  - py.test --cov
-  - coverage report -m
-  - coveralls
-
-after_test:
-  - python setup.py bdist_wheel
-
-artifacts:
-  - path: dist\*
diff --git a/docs/developer_guide_how_to_contribute.rst b/docs/developer_guide_how_to_contribute.rst
index e3b0036..85b43ea 100644
--- a/docs/developer_guide_how_to_contribute.rst
+++ b/docs/developer_guide_how_to_contribute.rst
@@ -3,16 +3,6 @@
 How to contribute
 -----------------
 
-.. index::
-    single: open source
-    single: contribution
-    single: code of conduct
-    single: PEP; 8
-    single: PEP; 257
-    single: documentation
-    single: compatibility
-    single: history
-
 Every open source project lives from the generous help by contributors that sacrifice their time and this is no different.
 
 Public Repositories
@@ -46,7 +36,7 @@ Here are a few hints and rules to get you started:
    In the best case, we can mold it into something, in the worst case the pull request gets politely closed.
    There's absolutely nothing to fear.
 
-Thank you for considering to contribute! If you have any question or concerns, feel free to reach out to us (see :ref:`credits-label`).
+Thank you for considering to contribute! If you have any question or concerns, feel free to reach out to us.
 
 .. _`short tutorial`: https://gist.github.com/giumas/67abeffcbf49d00703a57cbafac8b118
 .. _`GitHub`: https://github.com/hydroffice/hyo_soundspeed