diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index de7abde..079d88e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,8 +8,8 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.3.4
-    - uses: cachix/install-nix-action@v13
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - run: nix-shell --command "mypy audiobookdl"
diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 6c53537..6bbd949 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -8,8 +8,8 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.3.4
-    - uses: cachix/install-nix-action@v13
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - run: nix-shell --command "python3 -m pytest"
diff --git a/audiobookdl/sources/source/__init__.py b/audiobookdl/sources/source/__init__.py
index 6a353fe..80e2e7e 100644
--- a/audiobookdl/sources/source/__init__.py
+++ b/audiobookdl/sources/source/__init__.py
@@ -43,31 +43,26 @@ def __init__(self, options: Any):
         if self.create_storage_dir:
             os.makedirs(self.database_directory, exist_ok=True)
 
-
     @property
     def name(self) -> str:
         """Primary name of source"""
         return self.names[0].lower()
 
-
     @property
     def requires_authentication(self):
         """Returns `True` if this source requires authentication to download books"""
         return len(self._authentication_methods) > 0
 
-
     @property
     def authenticated(self):
         """Returns `True` if the source has been authenticated"""
         return self.__authenticated
 
-
     @property
     def supports_cookies(self):
         """Returns `True` if the source supports authentication with cookies"""
         return "cookies" in self._authentication_methods
 
-
     def load_cookie_file(self, cookie_file: str):
         """Loads cookies from a cookie file into session"""
         if self.supports_cookies:
@@ -77,17 +72,14 @@ def load_cookie_file(self, cookie_file: str):
             self._session.cookies.update(cookie_jar)
             self.__authenticated = True
 
-
     @property
     def supports_login(self):
         """Returns `True` if the source supports authentication with login"""
         return "login" in self._authentication_methods
 
-
     def _login(self, url: str, username: str, password: str):
         pass
 
-
     def login(self, url: str, **kwargs) -> None:
         """Authenticate with source using username and password"""
         if self.supports_login:
@@ -95,22 +87,18 @@ def login(self, url: str, **kwargs) -> None:
             self._login(url, **kwargs)
             self.__authenticated = True
 
-
     def download_from_id(self, book_id: T) -> Audiobook:
         """Download book specified by id"""
         raise NotImplementedError
 
-
     def download(self, url: str) -> Result:
         """Download book or series"""
         raise NotImplementedError
-    
-    
+
     def on_download_complete(self, audiobook: Audiobook):
         """Called after the download is complete"""
         pass
 
-
     def _get_page(self, url: str, use_cache: bool = True, **kwargs) -> bytes:
         """Download a page and caches it"""
         if url not in self.__pages and use_cache:
@@ -119,7 +107,6 @@ def _get_page(self, url: str, use_cache: bool = True, **kwargs) -> bytes:
                 self.__pages[url] = resp
         return self.__pages[url]
 
-
     def find_elem_in_page(self, url: str, selector: str, data=None, **kwargs):
         """
         Find the first html element in page from `url` that matches `selector`.
@@ -136,7 +123,6 @@ def find_elem_in_page(self, url: str, selector: str, data=None, **kwargs):
             return elem.text
         return elem.get(data)
 
-
     def find_elems_in_page(self, url: str, selector: str, **kwargs) -> Any:
         """
         Find all html elements in the page from `url` that's matches `selector`.
@@ -148,7 +134,6 @@ def find_elems_in_page(self, url: str, selector: str, **kwargs) -> Any:
         results = sel(tree)
         return results
 
-
     def find_in_page(self, url: str, regex: str, group_index: int = 0, **kwargs) -> str:
         """
         Find some text in a page based on a regex.
@@ -161,7 +146,6 @@ def find_in_page(self, url: str, regex: str, group_index: int = 0, **kwargs) ->
             raise DataNotPresent
         return m.group(group_index)
 
-
     def find_all_in_page(self, url: str, regex: str, **kwargs) -> list:
         """
         Find all places in a page that matches the regex.
@@ -180,7 +164,7 @@ def create_ssl_context(self, options: Any) -> SSLContext:
         # Custom SSLContext's are broken in requests version 2.32.0/2.32.1/2.32.2
         # fixed in version 2.32.3: https://github.com/psf/requests/pull/6716
         try:
-            ssl_context: SSLContext = urllib3.util.create_urllib3_context()
+            ssl_context: SSLContext = urllib3.util.create_urllib3_context()  # type: ignore[attr-defined]
 
             # Workaround for regression in requests version 2.32.3
             # https://github.com/psf/requests/issues/6730
diff --git a/shell.nix b/shell.nix
index 965c3a9..d0e2835 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,7 +3,7 @@ with import <nixpkgs> {};
 mkShell {
   buildInputs = [
     ffmpeg
-    (python3.withPackages(ps: with ps; [
+    (python312.withPackages(ps: with ps; [
       mutagen
       requests
       rich
@@ -17,6 +17,7 @@ mkShell {
       tomli
       attrs
       pycountry
+      urllib3
 
       # Test
       pytest