diff --git a/docs/_scripts/macros.py b/docs/_scripts/macros.py
index 07ef28de3..0e0a6ff6c 100644
--- a/docs/_scripts/macros.py
+++ b/docs/_scripts/macros.py
@@ -29,10 +29,7 @@ def _slugify(text: str) -> str:
     Returns:
         The slugified text.
     """
-    # The type of the return value is not defined for the markdown library.
-    # Also for some reason `mypy` thinks the `toc` module doesn't have a
-    # `slugify_unicode` function, but it definitely does.
-    return toc.slugify_unicode(text, "-")  # type: ignore[attr-defined,no-any-return]
+    return toc.slugify_unicode(text, "-")
 
 
 def _hook_macros_plugin(env: macros.MacrosPlugin) -> None:
diff --git a/mkdocs.yml b/mkdocs.yml
index a83b7a137..79d4b4f27 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -96,7 +96,6 @@ plugins:
       alias_type: redirect
       canonical_version: latest
   - mkdocstrings:
-      custom_templates: templates
       default_handler: python
       handlers:
         python:
diff --git a/pyproject.toml b/pyproject.toml
index f959eaed6..a60a93bbd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,28 +54,28 @@ dev-flake8 = [
   "flake8 == 6.1.0",
   "flake8-docstrings == 1.7.0",
   "flake8-pyproject == 1.2.3",  # For reading the flake8 config from pyproject.toml
-  "pydoclint == 0.3.3",
+  "pydoclint == 0.3.8",
   "pydocstyle == 6.3.0",
 ]
-dev-examples = ["polars == 0.19.3"]
-dev-formatting = ["black == 23.9.1", "isort == 5.12.0"]
+dev-examples = ["polars == 0.20.2"]
+dev-formatting = ["black == 23.12.1", "isort == 5.13.2"]
 dev-mkdocs = [
-  "black == 23.9.1",
-  "Markdown==3.4.4",
+  "black == 23.12.1",
+  "Markdown==3.5.1",
   "mike == 2.0.0",
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.1",
-  "mkdocs-macros-plugin == 1.0.4",
-  "mkdocs-material == 9.3.1",
-  "mkdocstrings[python] == 0.23.0",
+  "mkdocs-macros-plugin == 1.0.5",
+  "mkdocs-material == 9.5.3",
+  "mkdocstrings[python] == 0.24.0",
   "frequenz-repo-config[lib] == 0.7.4",
 ]
 dev-mypy = [
-  "mypy == 1.5.1",
+  "mypy == 1.8.0",
   "grpc-stubs == 1.24.12",              # This dependency introduces breaking changes in patch releases
-  "types-Markdown == 3.4.2.10",
+  "types-Markdown == 3.5.0.3",
   "types-PyYAML == 6.0.12.12",
-  "types-Pygments == 2.16.0.0",
+  "types-Pygments == 2.17.0.0",
   "types-colorama == 0.4.15.12",
   "types-protobuf == 4.24.0.4",
   "types-python-dateutil == 2.8.19.14",
@@ -91,10 +91,10 @@ dev-pylint = [
   "frequenz-sdk[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]
 dev-pytest = [
-  "pytest == 7.4.2",
+  "pytest == 7.4.4",
   "frequenz-repo-config[extra-lint-examples] == 0.7.4",
-  "pytest-mock == 3.11.1",
-  "pytest-asyncio == 0.21.1",
+  "pytest-mock == 3.12.0",
+  "pytest-asyncio == 0.23.3",
   "time-machine == 2.12.0",
   "async-solipsism == 0.5",
   # For checking docstring code examples
diff --git a/src/frequenz/sdk/timeseries/_resampling.py b/src/frequenz/sdk/timeseries/_resampling.py
index 1dc1251ca..d60b15922 100644
--- a/src/frequenz/sdk/timeseries/_resampling.py
+++ b/src/frequenz/sdk/timeseries/_resampling.py
@@ -14,6 +14,7 @@
 from collections.abc import AsyncIterator, Callable, Coroutine, Sequence
 from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
+from typing import cast
 
 from frequenz.channels.util import Timer
 from frequenz.channels.util._timer import _to_microseconds
@@ -501,13 +502,19 @@ async def resample(self, *, one_shot: bool = False) -> None:
             )
 
             self._window_end += self._config.resampling_period
-            exceptions = {
-                source: results[i]
-                for i, source in enumerate(self._resamplers)
-                # CancelledError inherits from BaseException, but we don't want
-                # to catch *all* BaseExceptions here.
-                if isinstance(results[i], (Exception, asyncio.CancelledError))
-            }
+            # We need the cast because mypy is not able to infer that this can only
+            # contain Exception | CancelledError because of the condition in the list
+            # comprehension below.
+            exceptions = cast(
+                dict[Source, Exception | asyncio.CancelledError],
+                {
+                    source: results[i]
+                    for i, source in enumerate(self._resamplers)
+                    # CancelledError inherits from BaseException, but we don't want
+                    # to catch *all* BaseExceptions here.
+                    if isinstance(results[i], (Exception, asyncio.CancelledError))
+                },
+            )
             if exceptions:
                 raise ResamplingError(exceptions)
             if one_shot:
diff --git a/src/frequenz/sdk/timeseries/formula_engine/_formula_engine.py b/src/frequenz/sdk/timeseries/formula_engine/_formula_engine.py
index b5cc63d2d..0c4159c7d 100644
--- a/src/frequenz/sdk/timeseries/formula_engine/_formula_engine.py
+++ b/src/frequenz/sdk/timeseries/formula_engine/_formula_engine.py
@@ -54,34 +54,36 @@
 }
 """The dictionary of operator precedence for the shunting yard algorithm."""
 
+
+# The `FormulaEngine*` and `HigherOrderFormulaBuilder*` classes are generic, but
+# `TypeVar`s can't be defined on generic types, so we need to use `# type: ignore` to
+# avoid mypy errors, and they get treated as `FormulaEngine[Any]`, etc.
+#
+# This is not ideal, but it's the best we can do until mypy supports generic types with
+# `TypeVar`s.
 _CompositionType = Union[
-    "FormulaEngine",
-    "HigherOrderFormulaBuilder",
-    "FormulaEngine3Phase",
-    "HigherOrderFormulaBuilder3Phase",
+    "FormulaEngine",  # type: ignore[type-arg]
+    "HigherOrderFormulaBuilder",  # type: ignore[type-arg]
+    "FormulaEngine3Phase",  # type: ignore[type-arg]
+    "HigherOrderFormulaBuilder3Phase",  # type: ignore[type-arg]
 ]
 
 _CompositionType1Phase = Union[
-    "FormulaEngine",
-    "HigherOrderFormulaBuilder",
+    "FormulaEngine",  # type: ignore[type-arg]
+    "HigherOrderFormulaBuilder",  # type: ignore[type-arg]
 ]
 
 _CompositionType3Phase = Union[
-    "FormulaEngine3Phase",
-    "HigherOrderFormulaBuilder3Phase",
+    "FormulaEngine3Phase",  # type: ignore[type-arg]
+    "HigherOrderFormulaBuilder3Phase",  # type: ignore[type-arg]
 ]
 
-# The `FormulaEngine*` and `HigherOrderFormulaBuilder*` classes are generic, but
-# `TypeVar`s can't be defined on generic types, so we need to use `# type: ignore` to
-# avoid mypy errors, and they get treated as `FormulaEngine[Any]`, etc.
-#
-# This is not ideal, but it's the best we can do until mypy supports generic types with
-# `TypeVar`s.
 _GenericEngine = TypeVar(
     "_GenericEngine",
     "FormulaEngine",  # type: ignore
     "FormulaEngine3Phase",  # type: ignore
 )
+
 _GenericHigherOrderBuilder = TypeVar(
     "_GenericHigherOrderBuilder",
     "HigherOrderFormulaBuilder",  # type: ignore
diff --git a/tests/microgrid/test_microgrid_api.py b/tests/microgrid/test_microgrid_api.py
index c30ca387e..d74ae3f38 100644
--- a/tests/microgrid/test_microgrid_api.py
+++ b/tests/microgrid/test_microgrid_api.py
@@ -102,7 +102,7 @@ def metadata(self) -> meta.Metadata:
     @mock.patch("grpc.aio.insecure_channel")
     async def test_connection_manager(
         self,
-        _: MagicMock,
+        _insecure_channel_mock: MagicMock,
         components: list[list[Component]],
         connections: list[list[Connection]],
         metadata: meta.Metadata,
@@ -110,7 +110,7 @@ async def test_connection_manager(
         """Test microgrid api.
 
         Args:
-            _: insecure channel mock from `mock.patch`
+            _insecure_channel_mock: insecure channel mock from `mock.patch`
             components: components
             connections: connections
             metadata: the metadata of the microgrid
@@ -179,7 +179,7 @@ async def test_connection_manager(
     @mock.patch("grpc.aio.insecure_channel")
     async def test_connection_manager_another_method(
         self,
-        _: MagicMock,
+        _insecure_channel_mock: MagicMock,
         components: list[list[Component]],
         connections: list[list[Connection]],
         metadata: meta.Metadata,
@@ -187,7 +187,7 @@ async def test_connection_manager_another_method(
         """Test if the api was not deallocated.
 
         Args:
-            _: insecure channel mock
+            _insecure_channel_mock: insecure channel mock
             components: components
             connections: connections
             metadata: the metadata of the microgrid