diff --git a/.github/workflows/tests-notebook-7.yml b/.github/workflows/tests-notebook-7.yml
deleted file mode 100644
index 82c88e9..0000000
--- a/.github/workflows/tests-notebook-7.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-name: Tests - notebook 7
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-    # Check all PR
-
-jobs:
-  tests:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        include:
-          - os: ubuntu-22.04
-            python-version: "3.11"
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Install Firefox
-      uses: browser-actions/setup-firefox@latest
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-    - run: pip install tox
-
-    - name: run Python tests
-      run: tox -e tests-notebook-7
-
-    - name: run Python tests for coverage
-      run: tox -e coverage
-    - uses: codecov/codecov-action@v3
-      with:
-        files: coverage.xml
-        verbose: true
-
diff --git a/pyproject.toml b/pyproject.toml
index ff9c04c..a4da607 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,8 +29,8 @@ classifiers = [
 ]
 dependencies = [
   "ipywidgets>=8.0.0",
-  "numpy",
-  "widget_code_input",
+  "numpy<2.0.0",
+  "widget_code_input<4.0.0",
   "matplotlib",
   "termcolor"
 ]
diff --git a/src/scwidgets/check/_widget_check_registry.py b/src/scwidgets/check/_widget_check_registry.py
index 582239a..ccdba22 100644
--- a/src/scwidgets/check/_widget_check_registry.py
+++ b/src/scwidgets/check/_widget_check_registry.py
@@ -250,9 +250,9 @@ def check_widget(self, widget: CheckableWidget) -> Union[ChecksResult, Exception
     def check_all_widgets(
         self,
     ) -> OrderedDict[CheckableWidget, Union[ChecksResult, Exception]]:
-        messages: OrderedDict[
-            CheckableWidget, Union[ChecksResult, Exception]
-        ] = OrderedDict()
+        messages: OrderedDict[CheckableWidget, Union[ChecksResult, Exception]] = (
+            OrderedDict()
+        )
         for widget in self._checks.keys():
             try:
                 messages[widget] = self.check_widget(widget)
diff --git a/src/scwidgets/exercise/_widget_code_exercise.py b/src/scwidgets/exercise/_widget_code_exercise.py
index 79dd625..17283a0 100644
--- a/src/scwidgets/exercise/_widget_code_exercise.py
+++ b/src/scwidgets/exercise/_widget_code_exercise.py
@@ -445,9 +445,11 @@ def __init__(
     def answer(self) -> dict:
         return {
             "code": None if self._code is None else self._code.function_body,
-            "parameter_panel": None
-            if self._parameter_panel is None
-            else self._parameter_panel.parameters,
+            "parameter_panel": (
+                None
+                if self._parameter_panel is None
+                else self._parameter_panel.parameters
+            ),
         }
 
     @answer.setter
diff --git a/tox.ini b/tox.ini
index bedf882..a4f101c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,38 +11,6 @@ envlist =
 
 [testenv]
 
-[testenv:tests-notebook-7]
-description =
-    Tests with jupyter notebook version > 7
-setenv =
-    # this is needed to run selenium on a machine without display to do CI
-    SELENIUM_FIREFOX_DRIVER_ARGS = {env:SELENIUM_FIREFOX_DRIVER_ARGS:--headless}
-    JUPYTER_TYPE = notebook
-    # use the jupyter config in the tox environment
-    # otherwise the users config is used
-    JUPYTER_CONFIG_DIR={envdir}/etc/jupyter
-    JUPYTER_DATA_DIR={envdir}/share/jupyter
-deps =
-    pytest
-    pytest-html<4.0.0,
-    # selenium juypter notebook tests
-    notebook==7.0.2
-    # fixing selenium version to have backwards-compatibility with pytest-selenium
-    # see https://github.com/robotframework/SeleniumLibrary/issues/1835#issuecomment-1581426365
-    selenium==4.9.0
-    pytest-selenium
-    jupytext==1.15.0
-    imageio
-    # we fix matplotlib for consistent image tests
-    matplotlib==3.7.2
-    numpy
-    scikit-image
-    ipympl
-commands =
-    # converts the python files to ipython notebooks
-    jupytext tests/notebooks/*.py --to ipynb
-    pytest {posargs:-v} --driver Firefox
-
 [testenv:tests-lab-3]
 description =
     Tests with jupyter lab version < 4
@@ -55,7 +23,7 @@ setenv =
     JUPYTER_CONFIG_DIR={envdir}/etc/jupyter
     JUPYTER_DATA_DIR={envdir}/share/jupyter
 deps =
-    pytest
+    pytest<8.0.0
     pytest-html<4.0.0,
     # selenium juypter notebook tests
     jupyterlab==3.6.5
@@ -67,7 +35,7 @@ deps =
     imageio
     # we fix matplotlib for consistent image tests
     matplotlib==3.7.2
-    numpy
+    numpy<2.0.0
     scikit-image
     ipympl
 commands =
@@ -80,7 +48,7 @@ commands =
 # includes the jupytext notebook files, because coverage is incompatible with
 # selenium
 deps =
-    pytest
+    pytest<8.0.0
     pytest-cov
     coverage[toml]
     selenium==4.9.0