diff --git a/gitlab/client.py b/gitlab/client.py
index fea52614a..5c89d6e7a 100644
--- a/gitlab/client.py
+++ b/gitlab/client.py
@@ -26,7 +26,13 @@
 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
 
diff --git a/setup.py b/setup.py
index 9a4e0163c..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=[">=0.14.3,<0.15"],
+    install_requires=["httpx>=0.18.1,<0.19"],
     python_requires=">=3.6.0",
     entry_points={"console_scripts": ["gitlab = gitlab.cli:main"]},
     classifiers=[