diff --git a/.gitignore b/.gitignore
index c480c1306..a78530840 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ docs/_build
 .tox
 venv/
 tags
+.venv/
diff --git a/gitlab/client.py b/gitlab/client.py
index 9312b30d8..5c89d6e7a 100644
--- a/gitlab/client.py
+++ b/gitlab/client.py
@@ -21,13 +21,18 @@
 import time
 from typing import Union
 
-import httpx
-
 import gitlab
 import gitlab.config
+import httpx
 from gitlab import exceptions as exc
 from gitlab import utils
-from gitlab.exceptions import GitlabHttpError, GitlabParsingError, on_http_error
+from gitlab.exceptions import (
+    GitlabAuthenticationError,
+    GitlabHttpError,
+    GitlabParsingError,
+    RedirectError,
+    on_http_error,
+)
 from gitlab.types import GitlabList
 from gitlab.utils import inherit_docstrings
 
@@ -159,7 +164,7 @@ def _get_client(self) -> httpx.AsyncClient:
 
         auth = None
         if self.http_username:
-            auth = httpx.auth.BasicAuth(self.http_username, self.http_password)
+            auth = httpx.BasicAuth(self.http_username, self.http_password)
 
         return self._httpx_client_class(
             auth=auth, verify=self.ssl_verify, timeout=self.timeout,
diff --git a/gitlab/tests/objects/test_application.py b/gitlab/tests/objects/test_application.py
index 1b027bafa..eef68259c 100644
--- a/gitlab/tests/objects/test_application.py
+++ b/gitlab/tests/objects/test_application.py
@@ -2,9 +2,8 @@
 
 import pytest
 import respx
-from httpx.status_codes import StatusCode
-
 from gitlab import AsyncGitlab
+from httpx import codes
 
 
 class TestApplicationAppearance:
@@ -31,7 +30,7 @@ async def test_get_update_appearance(self, gl, gl_get_value, is_gl_sync):
                 "message_font_color": "#ffffff",
                 "email_header_and_footer_enabled": False,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_update_appearance = respx.put(
             "http://localhost/api/v4/application/appearance",
@@ -48,7 +47,7 @@ async def test_get_update_appearance(self, gl, gl_get_value, is_gl_sync):
                 "message_font_color": "#ffffff",
                 "email_header_and_footer_enabled": False,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         appearance = gl.appearance.get()
@@ -86,7 +85,7 @@ async def test_update_appearance(self, gl, is_gl_sync):
                 "message_font_color": "#ffffff",
                 "email_header_and_footer_enabled": False,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         if is_gl_sync:
diff --git a/gitlab/tests/objects/test_projects.py b/gitlab/tests/objects/test_projects.py
index e3a846846..a970cd42e 100644
--- a/gitlab/tests/objects/test_projects.py
+++ b/gitlab/tests/objects/test_projects.py
@@ -1,8 +1,7 @@
 import pytest
 import respx
-from httpx.status_codes import StatusCode
-
 from gitlab import AsyncGitlab
+from httpx import codes
 
 
 class TestProjectSnippets:
@@ -22,7 +21,7 @@ async def test_list_project_snippets(self, gl, gl_get_value):
                     "visibility": visibility,
                 }
             ],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1, lazy=True)
@@ -47,7 +46,7 @@ async def test_get_project_snippet(self, gl, gl_get_value):
                 "content": "source code with multiple lines",
                 "visibility": visibility,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1, lazy=True)
@@ -71,7 +70,7 @@ async def test_create_update_project_snippets(self, gl, gl_get_value, is_gl_sync
                 "content": "source code with multiple lines",
                 "visibility": visibility,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         request_create = respx.post(
@@ -83,7 +82,7 @@ async def test_create_update_project_snippets(self, gl, gl_get_value, is_gl_sync
                 "content": "source code with multiple lines",
                 "visibility": visibility,
             },
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1, lazy=True)
diff --git a/gitlab/tests/test_async_mixins.py b/gitlab/tests/test_async_mixins.py
index fe013cea3..cc5876182 100644
--- a/gitlab/tests/test_async_mixins.py
+++ b/gitlab/tests/test_async_mixins.py
@@ -1,7 +1,5 @@
 import pytest
 import respx
-from httpx.status_codes import StatusCode
-
 from gitlab import AsyncGitlab
 from gitlab.base import RESTObject, RESTObjectList
 from gitlab.mixins import (
@@ -15,6 +13,7 @@
     SetMixin,
     UpdateMixin,
 )
+from httpx import codes
 
 from .test_mixins import FakeManager, FakeObject
 
@@ -36,7 +35,7 @@ class M(GetMixin, FakeManager):
             "http://localhost/api/v4/tests/42",
             headers={"Content-Type": "application/json"},
             content={"id": 42, "foo": "bar"},
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         mgr = M(gl)
         obj = await mgr.get(42)
@@ -54,7 +53,7 @@ class O(RefreshMixin, FakeObject):
             "http://localhost/api/v4/tests/42",
             headers={"Content-Type": "application/json"},
             content={"id": 42, "foo": "bar"},
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         mgr = FakeManager(gl)
         obj = O(mgr, {"id": 42})
@@ -73,7 +72,7 @@ class M(GetWithoutIdMixin, FakeManager):
             "http://localhost/api/v4/tests",
             headers={"Content-Type": "application/json"},
             content='{"foo": "bar"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -92,7 +91,7 @@ class M(ListMixin, FakeManager):
             "http://localhost/api/v4/tests",
             headers={"Content-Type": "application/json"},
             content='[{"id": 42, "foo": "bar"},{"id": 43, "foo": "baz"}]',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -119,7 +118,7 @@ class M(ListMixin, FakeManager):
             "http://localhost/api/v4/others",
             headers={"Content-Type": "application/json"},
             content='[{"id": 42, "foo": "bar"}]',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -142,7 +141,7 @@ class M(CreateMixin, FakeManager):
             "http://localhost/api/v4/tests",
             headers={"Content-Type": "application/json"},
             content='{"id": 42, "foo": "bar"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -162,7 +161,7 @@ class M(CreateMixin, FakeManager):
             "http://localhost/api/v4/others",
             headers={"Content-Type": "application/json"},
             content='{"id": 42, "foo": "bar"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -182,7 +181,7 @@ class M(UpdateMixin, FakeManager):
             "http://localhost/api/v4/tests/42",
             headers={"Content-Type": "application/json"},
             content='{"id": 42, "foo": "baz"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -202,7 +201,7 @@ class M(UpdateMixin, FakeManager):
             "http://localhost/api/v4/tests",
             headers={"Content-Type": "application/json"},
             content='{"foo": "baz"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         mgr = M(gl)
         server_data = await mgr.update(new_data={"foo": "baz"})
@@ -219,7 +218,7 @@ class M(DeleteMixin, FakeManager):
             "http://localhost/api/v4/tests/42",
             headers={"Content-Type": "application/json"},
             content="",
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -238,7 +237,7 @@ class O(SaveMixin, RESTObject):
             "http://localhost/api/v4/tests/42",
             headers={"Content-Type": "application/json"},
             content='{"id": 42, "foo": "baz"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
@@ -258,7 +257,7 @@ class M(SetMixin, FakeManager):
             "http://localhost/api/v4/tests/foo",
             headers={"Content-Type": "application/json"},
             content='{"key": "foo", "value": "bar"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         mgr = M(gl)
diff --git a/gitlab/tests/test_gitlab.py b/gitlab/tests/test_gitlab.py
index 2a659c830..5046790b1 100644
--- a/gitlab/tests/test_gitlab.py
+++ b/gitlab/tests/test_gitlab.py
@@ -23,8 +23,6 @@
 import httpx
 import pytest
 import respx
-from httpx.status_codes import StatusCode
-
 from gitlab import AsyncGitlab, Gitlab
 from gitlab import exceptions as exc
 from gitlab.client import _sanitize
@@ -41,6 +39,7 @@
     User,
     UserStatus,
 )
+from httpx import codes
 
 valid_config = b"""[global]
 default = one
@@ -144,7 +143,7 @@ def test_http_auth(self, gitlab_class):
         assert gl.private_token == "private_token"
         assert gl.oauth_token is None
         assert gl.job_token is None
-        assert isinstance(gl.client.auth, httpx.auth.BasicAuth)
+        assert isinstance(gl.client.auth, httpx.BasicAuth)
         assert gl.headers["PRIVATE-TOKEN"] == "private_token"
         assert "Authorization" not in gl.headers
 
@@ -167,7 +166,7 @@ async def test_build_list(self, gl, gl_get_value, is_gl_sync):
                 ),
             },
             content=[{"a": "b"}],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_2 = respx.get(
             "http://localhost/api/v4/tests?per_page=1&page=2",
@@ -180,7 +179,7 @@ async def test_build_list(self, gl, gl_get_value, is_gl_sync):
                 "X-Total": "2",
             },
             content=[{"c": "d"}],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         obj = gl.http_list("/tests", as_list=False)
         obj = await gl_get_value(obj)
@@ -217,7 +216,7 @@ async def test_all_ommited_when_as_list(self, gl, gl_get_value):
                 "X-Total": "2",
             },
             content=[{"c": "d"}],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_list("/tests", as_list=False, all=True)
@@ -242,14 +241,14 @@ async def test_http_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json"},
             content=[{"name": "project1"}],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         http_r = gl.http_request("get", "/projects")
         http_r = await gl_get_value(http_r)
 
         http_r.json()
-        assert http_r.status_code == StatusCode.OK
+        assert http_r.status_code == codes.OK
 
     @respx.mock
     @pytest.mark.asyncio
@@ -258,7 +257,7 @@ async def test_get_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json"},
             content={"name": "project1"},
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_get("/projects")
@@ -274,7 +273,7 @@ async def test_get_request_raw(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/octet-stream"},
             content="content",
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_get("/projects")
@@ -290,7 +289,7 @@ async def test_get_request_raw(self, gl, gl_get_value):
                 {
                     "url": "http://localhost/api/v4/not_there",
                     "content": "Here is why it failed",
-                    "status_code": StatusCode.NOT_FOUND,
+                    "status_code": codes.NOT_FOUND,
                 },
                 exc.GitlabHttpError,
                 "/not_there",
@@ -300,7 +299,7 @@ async def test_get_request_raw(self, gl, gl_get_value):
                     "url": "http://localhost/api/v4/projects",
                     "headers": {"content-type": "application/json"},
                     "content": '["name": "project1"]',
-                    "status_code": StatusCode.OK,
+                    "status_code": codes.OK,
                 },
                 exc.GitlabParsingError,
                 "/projects",
@@ -335,7 +334,7 @@ async def test_list_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json", "X-Total": "1"},
             content=[{"name": "project1"}],
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_list("/projects", as_list=True)
@@ -360,7 +359,7 @@ async def test_post_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json"},
             content={"name": "project1"},
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_post("/projects")
@@ -376,7 +375,7 @@ async def test_put_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json"},
             content='{"name": "project1"}',
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         result = gl.http_put("/projects")
         result = await gl_get_value(result)
@@ -391,7 +390,7 @@ async def test_delete_request(self, gl, gl_get_value):
             "http://localhost/api/v4/projects",
             headers={"content-type": "application/json"},
             content="true",
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         result = gl.http_delete("/projects")
@@ -406,7 +405,7 @@ async def test_delete_request_404(self, gl, is_gl_sync):
         result = respx.delete(
             "http://localhost/api/v4/not_there",
             content="Here is why it failed",
-            status_code=StatusCode.NOT_FOUND,
+            status_code=codes.NOT_FOUND,
         )
 
         with pytest.raises(exc.GitlabHttpError):
@@ -444,7 +443,7 @@ async def test_token_auth(self, gl, is_gl_sync):
             content='{{"id": {0:d}, "username": "{1:s}"}}'.format(id_, name).encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         if is_gl_sync:
@@ -462,7 +461,7 @@ async def test_hooks(self, gl, gl_get_value):
             "http://localhost/api/v4/hooks/1",
             headers={"content-type": "application/json"},
             content='{"url": "testurl", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         data = gl.hooks.get(1)
@@ -479,7 +478,7 @@ async def test_projects(self, gl, gl_get_value):
             "http://localhost/api/v4/projects/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         data = gl.projects.get(1)
@@ -495,7 +494,7 @@ async def test_project_environments(self, gl, gl_get_value):
             "http://localhost/api/v4/projects/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_get_environment = respx.get(
             "http://localhost/api/v4/projects/1/environments/1",
@@ -503,7 +502,7 @@ async def test_project_environments(self, gl, gl_get_value):
             content='{"name": "environment_name", "id": 1, "last_deployment": "sometime"}'.encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1)
@@ -523,7 +522,7 @@ async def test_project_additional_statistics(self, gl, gl_get_value):
             "http://localhost/api/v4/projects/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_get_environment = respx.get(
             "http://localhost/api/v4/projects/1/statistics",
@@ -531,7 +530,7 @@ async def test_project_additional_statistics(self, gl, gl_get_value):
             content="""{"fetches": {"total": 50, "days": [{"count": 10, "date": "2018-01-10"}]}}""".encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         project = gl.projects.get(1)
         project = await gl_get_value(project)
@@ -547,7 +546,7 @@ async def test_project_issues_statistics(self, gl, gl_get_value):
             "http://localhost/api/v4/projects/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_get_environment = respx.get(
             "http://localhost/api/v4/projects/1/issues_statistics",
@@ -555,7 +554,7 @@ async def test_project_issues_statistics(self, gl, gl_get_value):
             content="""{"statistics": {"counts": {"all": 20, "closed": 5, "opened": 15}}}""".encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1)
@@ -573,7 +572,7 @@ async def test_groups(self, gl, gl_get_value):
             "http://localhost/api/v4/groups/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1, "path": "path"}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         data = gl.groups.get(1)
@@ -591,7 +590,7 @@ async def test_issues(self, gl, gl_get_value):
             headers={"content-type": "application/json"},
             content='[{"name": "name", "id": 1}, '
             '{"name": "other_name", "id": 2}]'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         data = gl.issues.list()
@@ -608,7 +607,7 @@ def respx_get_user_params(self):
                 '{"name": "name", "id": 1, "password": "password", '
                 '"username": "username", "email": "email"}'.encode("utf-8")
             ),
-            "status_code": StatusCode.OK,
+            "status_code": codes.OK,
         }
 
     @respx.mock
@@ -632,7 +631,7 @@ async def test_user_status(self, gl, gl_get_value, respx_get_user_params):
             content='{"message": "test", "message_html": "<h1>Message</h1>", "emoji": "thumbsup"}'.encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_user = respx.get(**respx_get_user_params)
 
@@ -657,13 +656,13 @@ async def test_todo(self, gl, gl_get_value, is_gl_sync):
             "http://localhost/api/v4/todos",
             headers={"content-type": "application/json"},
             content=encoded_content,
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_mark_as_done = respx.post(
             "http://localhost/api/v4/todos/102/mark_as_done",
             headers={"content-type": "application/json"},
             content=json.dumps(json_content[0]).encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         todo_list = gl.todos.list()
@@ -703,7 +702,7 @@ async def test_deployment(self, gl, gl_get_value, is_gl_sync):
             "http://localhost/api/v4/projects/1/deployments",
             headers={"content-type": "application/json"},
             content=json_content,
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
 
         project = gl.projects.get(1, lazy=True)
@@ -726,7 +725,7 @@ async def test_deployment(self, gl, gl_get_value, is_gl_sync):
             "http://localhost/api/v4/projects/1/deployments/42",
             headers={"content-type": "application/json"},
             content=json_content,
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         deployment.status = "failed"
 
@@ -744,13 +743,13 @@ async def test_user_activate_deactivate(self, gl, is_gl_sync):
             "http://localhost/api/v4/users/1/activate",
             headers={"content-type": "application/json"},
             content={},
-            status_code=StatusCode.CREATED,
+            status_code=codes.CREATED,
         )
         request_deactivate = respx.post(
             "http://localhost/api/v4/users/1/deactivate",
             headers={"content-type": "application/json"},
             content={},
-            status_code=StatusCode.CREATED,
+            status_code=codes.CREATED,
         )
 
         user = gl.users.get(1, lazy=True)
@@ -768,7 +767,7 @@ async def test_update_submodule(self, gl, gl_get_value):
             "http://localhost/api/v4/projects/1",
             headers={"content-type": "application/json"},
             content='{"name": "name", "id": 1}'.encode("utf-8"),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         request_update_submodule = respx.put(
             "http://localhost/api/v4/projects/1/repository/submodules/foo%2Fbar",
@@ -789,7 +788,7 @@ async def test_update_submodule(self, gl, gl_get_value):
             "status": null}""".encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         project = gl.projects.get(1)
         project = await gl_get_value(project)
@@ -822,7 +821,7 @@ async def test_import_github(self, gl, gl_get_value):
             }""".encode(
                 "utf-8"
             ),
-            status_code=StatusCode.OK,
+            status_code=codes.OK,
         )
         base_path = "/root"
         name = "my-repo"
diff --git a/requirements.txt b/requirements.txt
index 54876157b..8ef0b29dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-httpx>=0.11.1,<0.12
+httpx>=0.14.3,<0.15
diff --git a/setup.py b/setup.py
index 06f444fc2..d95bebb31 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ def get_version():
     license="LGPLv3",
     url="https://github.com/python-gitlab/python-gitlab",
     packages=find_packages(),
-    install_requires=["httpx>=0.11.1,<0.12"],
+    install_requires=["httpx>=0.18.1,<0.19"],
     python_requires=">=3.6.0",
     entry_points={"console_scripts": ["gitlab = gitlab.cli:main"]},
     classifiers=[
diff --git a/test-requirements.txt b/test-requirements.txt
index bbb8142ee..6d1965adc 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,6 +8,6 @@ mock
 sphinx>=1.3
 sphinx_rtd_theme
 requests>=2.22.0
-respx>=0.10.0,<0.11
+respx>=0.12.1,<0.13
 pytest
 pytest-asyncio