diff --git a/requirements/test.txt b/requirements/test.txt
index 2522c2957..ba81c475b 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,5 +1,5 @@
-Flask==2.2.3
-werkzeug==2.2.3
+Flask==2.3.2
+werkzeug==2.3.7
 coverage==7.3.0
 argparse
 Django>=2.0.6
diff --git a/setup.py b/setup.py
index 3a63cc6ad..5c33ee26f 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ def get_version_data() -> dict:
     extras_require={
         "zope.testbrowser": ["zope.testbrowser>=6.0", "lxml>=4.2.4", "cssselect"],
         "django": ["Django>=2.0.6", "lxml>=4.2.4", "cssselect"],
-        "flask": ["Flask>=2.0.2", "lxml>=4.2.4", "cssselect"],
+        "flask": ["Flask>=2.3.2", "lxml>=4.2.4", "cssselect"],
         "selenium": ["selenium>=4.1.0,<4.5.0"],
     },
     tests_require=["coverage", "flask"],
diff --git a/splinter/driver/flaskclient.py b/splinter/driver/flaskclient.py
index d567ab8b4..390a46a8e 100644
--- a/splinter/driver/flaskclient.py
+++ b/splinter/driver/flaskclient.py
@@ -16,41 +16,42 @@
 class CookieManager(CookieManagerAPI):
     def add(self, cookie, **kwargs):
         for key, value in cookie.items():
-            kwargs["server_name"] = "localhost"
-            kwargs["key"] = key
-            kwargs["value"] = value
-            self.driver.set_cookie(**kwargs)
+            self.driver.set_cookie(
+                key=key,
+                value=value,
+                domain="localhost",
+                **kwargs,
+            )
 
     def delete(self, *cookies):
         if cookies:
             for cookie in cookies:
                 try:
-                    self.driver.delete_cookie("localhost", cookie)
+                    self.driver.delete_cookie(cookie)
                 except KeyError:
                     pass
 
     def delete_all(self):
-        self.driver.cookie_jar.clear()
+        self.driver._cookies.clear()
 
     def all(self, verbose=False):  # NOQA: A003
         cookies = {}
         for cookie in self.driver.cookie_jar:
-            cookies[cookie.name] = cookie.value
+            cookies[cookie.key] = cookie.value
         return cookies
 
     def __getitem__(self, item):
-        cookies = {c.name: c for c in self.driver.cookie_jar}
-        return cookies[item].value
+        return self.driver.get_cookie(item).value
 
     def __contains__(self, key):
         for cookie in self.driver.cookie_jar:
-            if cookie.name == key:
+            if cookie.key == key:
                 return True
         return False
 
     def __eq__(self, other_object):
         if isinstance(other_object, dict):
-            cookies_dict = {c.name: c.value for c in self.driver.cookie_jar}
+            cookies_dict = {c.key: c.value for c in self.driver.cookie_jar}
             return cookies_dict == other_object
         return False
 
diff --git a/tests/test_flaskclient.py b/tests/test_flaskclient.py
index 63f216d5b..b58dec675 100644
--- a/tests/test_flaskclient.py
+++ b/tests/test_flaskclient.py
@@ -171,8 +171,8 @@ def test_cookies_extra_parameters(self):
         """Cookie can be created with extra parameters."""
         timestamp = int(time.time() + 120)
         self.browser.cookies.add({"sha": "zam"}, expires=timestamp)
-        cookie = {c.name: c for c in self.browser._browser.cookie_jar}["sha"]
-        assert timestamp == cookie.expires
+        cookie = {c.key: c for c in self.browser._browser.cookie_jar}["sha"]
+        assert timestamp == int(cookie.expires.timestamp())
 
 
 class FlaskClientDriverTestWithCustomHeaders(unittest.TestCase):