diff --git a/src/crawlee/_browserforge_workaround.py b/src/crawlee/_browserforge_workaround.py
index 8e8dcceca4..ed84e06baa 100644
--- a/src/crawlee/_browserforge_workaround.py
+++ b/src/crawlee/_browserforge_workaround.py
@@ -1,4 +1,8 @@
 # ruff: noqa: N802, PLC0415
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
 
 
 def patch_browserforge() -> None:
@@ -12,7 +16,7 @@ def patch_browserforge() -> None:
     import apify_fingerprint_datapoints
     from browserforge import download
 
-    download.DATA_DIRS: dict[str, Path] = {  # type:ignore[misc]
+    download.DATA_DIRS = {
         'headers': apify_fingerprint_datapoints.get_header_network().parent,
         'fingerprints': apify_fingerprint_datapoints.get_fingerprint_network().parent,
     }
@@ -20,7 +24,7 @@ def patch_browserforge() -> None:
     def DownloadIfNotExists(**flags: bool) -> None:
         pass
 
-    download.DownloadIfNotExists = DownloadIfNotExists  # ty: ignore[invalid-assignment]
+    download.DownloadIfNotExists: Callable[..., None] = DownloadIfNotExists
 
     import browserforge.bayesian_network
 
@@ -33,7 +37,7 @@ def __init__(self, path: Path) -> None:
                 path = download.DATA_DIRS['fingerprints'] / download.DATA_FILES['fingerprints'][path.name]
             super().__init__(path)
 
-    browserforge.bayesian_network.BayesianNetwork = BayesianNetwork  # type:ignore[misc]
+    browserforge.bayesian_network.BayesianNetwork: BayesianNetwork = BayesianNetwork
     import browserforge.headers.generator
 
     browserforge.headers.generator.DATA_DIR = download.DATA_DIRS['headers']
diff --git a/src/crawlee/_utils/context.py b/src/crawlee/_utils/context.py
index 6f3a65094b..9faa994376 100644
--- a/src/crawlee/_utils/context.py
+++ b/src/crawlee/_utils/context.py
@@ -3,7 +3,7 @@
 import inspect
 from collections.abc import Callable
 from functools import wraps
-from typing import Any, TypeVar
+from typing import Any, TypeVar, cast
 
 T = TypeVar('T', bound=Callable[..., Any])
 
@@ -44,4 +44,4 @@ async def async_wrapper(self: Any, *args: Any, **kwargs: Any) -> Any:
 
         return await method(self, *args, **kwargs)
 
-    return async_wrapper if inspect.iscoroutinefunction(method) else sync_wrapper  # ty: ignore[invalid-return-type]
+    return cast('T', async_wrapper if inspect.iscoroutinefunction(method) else sync_wrapper)
diff --git a/src/crawlee/fingerprint_suite/_browserforge_adapter.py b/src/crawlee/fingerprint_suite/_browserforge_adapter.py
index 1b39da0006..98460abb00 100644
--- a/src/crawlee/fingerprint_suite/_browserforge_adapter.py
+++ b/src/crawlee/fingerprint_suite/_browserforge_adapter.py
@@ -154,7 +154,7 @@ def _get_single_browser_type(self, browser: Iterable[str | Browser] | None) -> s
 class PatchedFingerprintGenerator(bf_FingerprintGenerator):
     """Browserforge `FingerprintGenerator` that contains patches not accepted in upstream repo."""
 
-    def __init__(  # type:ignore[no-untyped-def]  # Upstream repo types missing.
+    def __init__(
         self,
         *,
         screen: Screen | None = None,
diff --git a/src/crawlee/sessions/_cookies.py b/src/crawlee/sessions/_cookies.py
index f4878a7d78..4af98faf50 100644
--- a/src/crawlee/sessions/_cookies.py
+++ b/src/crawlee/sessions/_cookies.py
@@ -10,6 +10,7 @@
 
 if TYPE_CHECKING:
     from collections.abc import Iterator
+    from typing import TypeGuard
 
 
 @docs_group('Session management')
@@ -152,8 +153,8 @@ def _convert_cookie_to_dict(self, cookie: Cookie) -> CookieParam:
         if cookie.expires:
             cookie_dict['expires'] = cookie.expires
 
-        if (same_site := cookie.get_nonstandard_attr('SameSite')) and same_site in {'Lax', 'None', 'Strict'}:
-            cookie_dict['same_site'] = same_site  # ty: ignore[invalid-assignment]
+        if (same_site := cookie.get_nonstandard_attr('SameSite')) and self._is_valid_same_site(same_site):
+            cookie_dict['same_site'] = same_site
 
         return cookie_dict
 
@@ -274,3 +275,6 @@ def __hash__(self) -> int:
         """Return hash based on the cookies key attributes."""
         cookie_tuples = frozenset((cookie.name, cookie.value, cookie.domain, cookie.path) for cookie in self._jar)
         return hash(cookie_tuples)
+
+    def _is_valid_same_site(self, value: str | None) -> TypeGuard[Literal['Lax', 'None', 'Strict']]:
+        return value in {'Lax', 'None', 'Strict'}
diff --git a/tests/unit/crawlers/_playwright/test_playwright_crawler.py b/tests/unit/crawlers/_playwright/test_playwright_crawler.py
index db60867b44..1ecdb8859b 100644
--- a/tests/unit/crawlers/_playwright/test_playwright_crawler.py
+++ b/tests/unit/crawlers/_playwright/test_playwright_crawler.py
@@ -425,7 +425,7 @@ async def test_save_cookies_after_handler_processing(server_url: URL) -> None:
         @crawler.router.default_handler
         async def request_handler(context: PlaywrightCrawlingContext) -> None:
             # Simulate cookies installed from an external source in the browser
-            await context.page.context.add_cookies([{'name': 'check', 'value': 'test', 'url': str(server_url)}])  # ty: ignore[invalid-argument-type]
+            await context.page.context.add_cookies([{'name': 'check', 'value': 'test', 'url': str(server_url)}])
 
             if context.session:
                 session_ids.append(context.session.id)