diff --git a/lib/platformdirs/__init__.py b/lib/platformdirs/__init__.py
index 3d5a5bda..75c8bff9 100644
--- a/lib/platformdirs/__init__.py
+++ b/lib/platformdirs/__init__.py
@@ -2,6 +2,7 @@
 Utilities for determining application-specific dirs. See <https://github.com/platformdirs/platformdirs> for details and
 usage.
 """
+
 from __future__ import annotations
 
 import os
@@ -14,11 +15,7 @@ from .version import __version_tuple__ as __version_info__
 
 if TYPE_CHECKING:
     from pathlib import Path
-
-    if sys.version_info >= (3, 8):  # pragma: no cover (py38+)
-        from typing import Literal
-    else:  # pragma: no cover (py38+)
-        from typing_extensions import Literal
+    from typing import Literal
 
 
 def _set_platform_dir_class() -> type[PlatformDirsABC]:
diff --git a/lib/platformdirs/__main__.py b/lib/platformdirs/__main__.py
index 3cefedbd..4bf27c9c 100644
--- a/lib/platformdirs/__main__.py
+++ b/lib/platformdirs/__main__.py
@@ -1,4 +1,5 @@
 """Main entry point."""
+
 from __future__ import annotations
 
 from platformdirs import PlatformDirs, __version__
diff --git a/lib/platformdirs/android.py b/lib/platformdirs/android.py
index 572559f8..4acdb638 100644
--- a/lib/platformdirs/android.py
+++ b/lib/platformdirs/android.py
@@ -1,4 +1,5 @@
 """Android."""
+
 from __future__ import annotations
 
 import os
diff --git a/lib/platformdirs/api.py b/lib/platformdirs/api.py
index aa9ce7b9..031a38a3 100644
--- a/lib/platformdirs/api.py
+++ b/lib/platformdirs/api.py
@@ -1,4 +1,5 @@
 """Base API."""
+
 from __future__ import annotations
 
 import os
@@ -7,12 +8,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    import sys
-
-    if sys.version_info >= (3, 8):  # pragma: no cover (py38+)
-        from typing import Literal
-    else:  # pragma: no cover (py38+)
-        from typing_extensions import Literal
+    from typing import Iterator, Literal
 
 
 class PlatformDirsABC(ABC):
@@ -241,3 +237,43 @@ class PlatformDirsABC(ABC):
     def site_runtime_path(self) -> Path:
         """:return: runtime path shared by users"""
         return Path(self.site_runtime_dir)
+
+    def iter_config_dirs(self) -> Iterator[str]:
+        """:yield: all user and site configuration directories."""
+        yield self.user_config_dir
+        yield self.site_config_dir
+
+    def iter_data_dirs(self) -> Iterator[str]:
+        """:yield: all user and site data directories."""
+        yield self.user_data_dir
+        yield self.site_data_dir
+
+    def iter_cache_dirs(self) -> Iterator[str]:
+        """:yield: all user and site cache directories."""
+        yield self.user_cache_dir
+        yield self.site_cache_dir
+
+    def iter_runtime_dirs(self) -> Iterator[str]:
+        """:yield: all user and site runtime directories."""
+        yield self.user_runtime_dir
+        yield self.site_runtime_dir
+
+    def iter_config_paths(self) -> Iterator[Path]:
+        """:yield: all user and site configuration paths."""
+        for path in self.iter_config_dirs():
+            yield Path(path)
+
+    def iter_data_paths(self) -> Iterator[Path]:
+        """:yield: all user and site data paths."""
+        for path in self.iter_data_dirs():
+            yield Path(path)
+
+    def iter_cache_paths(self) -> Iterator[Path]:
+        """:yield: all user and site cache paths."""
+        for path in self.iter_cache_dirs():
+            yield Path(path)
+
+    def iter_runtime_paths(self) -> Iterator[Path]:
+        """:yield: all user and site runtime paths."""
+        for path in self.iter_runtime_dirs():
+            yield Path(path)
diff --git a/lib/platformdirs/macos.py b/lib/platformdirs/macos.py
index c01ce163..b7b48808 100644
--- a/lib/platformdirs/macos.py
+++ b/lib/platformdirs/macos.py
@@ -1,4 +1,5 @@
 """macOS."""
+
 from __future__ import annotations
 
 import os.path
diff --git a/lib/platformdirs/unix.py b/lib/platformdirs/unix.py
index 1d0174f2..ca4728e6 100644
--- a/lib/platformdirs/unix.py
+++ b/lib/platformdirs/unix.py
@@ -1,10 +1,12 @@
 """Unix."""
+
 from __future__ import annotations
 
 import os
 import sys
 from configparser import ConfigParser
 from pathlib import Path
+from typing import Iterator
 
 from .api import PlatformDirsABC
 
@@ -43,24 +45,24 @@ class Unix(PlatformDirsABC):
         return self._append_app_name_and_version(path)
 
     @property
-    def site_data_dir(self) -> str:
-        """
-        :return: data directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>` is
-         enabled and ``XDG_DATA_DIR`` is set and a multi path the response is also a multi path separated by the OS
-         path separator), e.g. ``/usr/local/share/$appname/$version`` or ``/usr/share/$appname/$version``
-        """
-        # XDG default for $XDG_DATA_DIRS; only first, if multipath is False
+    def _site_data_dirs(self) -> list[str]:
         path = os.environ.get("XDG_DATA_DIRS", "")
         if not path.strip():
             path = f"/usr/local/share{os.pathsep}/usr/share"
-        return self._with_multi_path(path)
+        return [self._append_app_name_and_version(p) for p in path.split(os.pathsep)]
 
-    def _with_multi_path(self, path: str) -> str:
-        path_list = path.split(os.pathsep)
+    @property
+    def site_data_dir(self) -> str:
+        """
+        :return: data directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>` is
+         enabled and ``XDG_DATA_DIRS`` is set and a multi path the response is also a multi path separated by the
+         OS path separator), e.g. ``/usr/local/share/$appname/$version`` or ``/usr/share/$appname/$version``
+        """
+        # XDG default for $XDG_DATA_DIRS; only first, if multipath is False
+        dirs = self._site_data_dirs
         if not self.multipath:
-            path_list = path_list[0:1]
-        path_list = [self._append_app_name_and_version(os.path.expanduser(p)) for p in path_list]  # noqa: PTH111
-        return os.pathsep.join(path_list)
+            return dirs[0]
+        return os.pathsep.join(dirs)
 
     @property
     def user_config_dir(self) -> str:
@@ -74,17 +76,24 @@ class Unix(PlatformDirsABC):
         return self._append_app_name_and_version(path)
 
     @property
-    def site_config_dir(self) -> str:
-        """
-        :return: config directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>`
-         is enabled and ``XDG_DATA_DIR`` is set and a multi path the response is also a multi path separated by the OS
-         path separator), e.g. ``/etc/xdg/$appname/$version``
-        """
-        # XDG default for $XDG_CONFIG_DIRS only first, if multipath is False
+    def _site_config_dirs(self) -> list[str]:
         path = os.environ.get("XDG_CONFIG_DIRS", "")
         if not path.strip():
             path = "/etc/xdg"
-        return self._with_multi_path(path)
+        return [self._append_app_name_and_version(p) for p in path.split(os.pathsep)]
+
+    @property
+    def site_config_dir(self) -> str:
+        """
+        :return: config directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>`
+         is enabled and ``XDG_CONFIG_DIRS`` is set and a multi path the response is also a multi path separated by
+         the OS path separator), e.g. ``/etc/xdg/$appname/$version``
+        """
+        # XDG default for $XDG_CONFIG_DIRS only first, if multipath is False
+        dirs = self._site_config_dirs
+        if not self.multipath:
+            return dirs[0]
+        return os.pathsep.join(dirs)
 
     @property
     def user_cache_dir(self) -> str:
@@ -99,8 +108,8 @@ class Unix(PlatformDirsABC):
 
     @property
     def site_cache_dir(self) -> str:
-        """:return: cache directory shared by users, e.g. ``/var/tmp/$appname/$version``"""
-        return self._append_app_name_and_version("/var/tmp")  # noqa: S108
+        """:return: cache directory shared by users, e.g. ``/var/cache/$appname/$version``"""
+        return self._append_app_name_and_version("/var/cache")
 
     @property
     def user_state_dir(self) -> str:
@@ -215,6 +224,16 @@ class Unix(PlatformDirsABC):
             directory = directory.split(os.pathsep)[0]
         return Path(directory)
 
+    def iter_config_dirs(self) -> Iterator[str]:
+        """:yield: all user and site configuration directories."""
+        yield self.user_config_dir
+        yield from self._site_config_dirs
+
+    def iter_data_dirs(self) -> Iterator[str]:
+        """:yield: all user and site data directories."""
+        yield self.user_data_dir
+        yield from self._site_data_dirs
+
 
 def _get_user_media_dir(env_var: str, fallback_tilde_path: str) -> str:
     media_dir = _get_user_dirs_folder(env_var)
diff --git a/lib/platformdirs/version.py b/lib/platformdirs/version.py
index c2ef2084..cc1e3456 100644
--- a/lib/platformdirs/version.py
+++ b/lib/platformdirs/version.py
@@ -12,5 +12,5 @@ __version__: str
 __version_tuple__: VERSION_TUPLE
 version_tuple: VERSION_TUPLE
 
-__version__ = version = '3.11.0'
-__version_tuple__ = version_tuple = (3, 11, 0)
+__version__ = version = '4.2.0'
+__version_tuple__ = version_tuple = (4, 2, 0)
diff --git a/lib/platformdirs/windows.py b/lib/platformdirs/windows.py
index 751143ad..c62d0c8d 100644
--- a/lib/platformdirs/windows.py
+++ b/lib/platformdirs/windows.py
@@ -1,4 +1,5 @@
 """Windows."""
+
 from __future__ import annotations
 
 import ctypes
diff --git a/requirements.txt b/requirements.txt
index 53efa2e8..a1f27d23 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ MarkupSafe==2.1.3
 musicbrainzngs==0.7.1
 packaging==23.1
 paho-mqtt==1.6.1
-platformdirs==3.11.0
+platformdirs==4.2.0
 plexapi==4.15.10
 portend==3.2.0
 profilehooks==1.12.0