diff --git a/.github/workflows/alns.yaml b/.github/workflows/alns.yaml
index 785feb43..79ec9f86 100644
--- a/.github/workflows/alns.yaml
+++ b/.github/workflows/alns.yaml
@@ -13,31 +13,28 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12' ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Update pip and poetry
         run: |
           python -m pip install --upgrade pip
           pip install poetry
-      - name: Get current time
-        uses: josStorer/get-current-time@v2.0.2
-        id: current-time
       - name: Cache Python dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-python
         with:
           path: ~/.cache/pypoetry
-          key: ${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}-${{ steps.current-time.outputs.year }}-${{ steps.current-time.outputs.month }}
+          key: ${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}
       - name: Install Python dependencies
         if: steps.cache-python.outputs.cache-hit != 'true'
         run: poetry install
       - name: Cache pre-commit
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-pre-commit
         with:
           path: ~/.cache/pre-commit/
@@ -49,7 +46,7 @@ jobs:
         run: poetry run pytest
       - name: Run pre-commit
         run: poetry run pre-commit run --all-files
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
   deploy:
@@ -57,11 +54,11 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'created'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.11
       - name: Update pip and poetry
         run: |
           python -m pip install --upgrade pip
diff --git a/README.md b/README.md
index 7740f26b..6ccd3901 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,10 @@ one!
 
 ### Getting help
 
-If you are looking for help, please follow the instructions [here][7].
+Feel free to open an issue or a new discussion thread here on GitHub.
+Please do not e-mail us with questions, modelling issues, or code examples.
+Those are much easier to discuss via GitHub than over e-mail.
+When writing your issue or discussion, please follow the instructions [here][7].
 
 ### How to cite `alns`
 
diff --git a/docs/source/setup/getting_help.rst b/docs/source/setup/getting_help.rst
index ce62dc0a..252c7bdc 100644
--- a/docs/source/setup/getting_help.rst
+++ b/docs/source/setup/getting_help.rst
@@ -4,6 +4,12 @@ Getting help
 Conversations about development and issues take place in the `GitHub repository <https://github.com/N-Wouda/ALNS/>`_.
 Feel free to open a new issue if you have something to discuss.
 
+.. note::
+
+   Please do not e-mail us with questions, modelling issues, or code examples.
+   Those are much easier to discuss via GitHub than over e-mail.
+
+
 Submitting a bug report
 -----------------------
 
@@ -25,3 +31,10 @@ To limit the amount of time needed to triage your problem, please do the followi
   .. code-block:: shell
 
      python -c 'import alns; alns.show_versions()'
+
+
+Submitting a feature request
+----------------------------
+
+Please first browse the existing issues and discussions in the GitHub repository to see if your feature has already been requested.
+If it has not, please open a new issue in the repository, using the "Feature request" template.
diff --git a/pyproject.toml b/pyproject.toml
index 134bdfbb..e8f462d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,8 +30,12 @@ classifiers = [
 "Tracker" = "https://github.com/N-Wouda/ALNS/issues"
 
 [tool.poetry.dependencies]
-python = "^3.8, <4.0"
-numpy = ">=1.18.0"
+python = "^3.9, <4.0"
+numpy = [
+    # Numpy 1.26 is the first version of numpy that supports Python 3.12.
+    { version = ">=1.18.0", python = "<3.12" },
+    { version = ">=1.26.0", python = ">=3.12" }
+]
 matplotlib = ">=3.5.0"
 mabwiser = { version = ">=2.7.1", optional = true }