diff --git a/pyproject.toml b/pyproject.toml
index 9592626..ba1dd7c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ urllib3 = ">= 1.25.3"
 python-dateutil = ">=2.8.2"
 pydantic = ">=2"
 typing-extensions = ">=4.7.1"
+httpx = ">=0.23"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.2.1"
diff --git a/requirements.txt b/requirements.txt
index cc85509..7d22e04 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ setuptools >= 21.0.0
 urllib3 >= 1.25.3, < 2.1.0
 pydantic >= 2
 typing-extensions >= 4.7.1
+httpx >= 0.23
diff --git a/setup.py b/setup.py
index dc6b43b..78019dd 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@
     "python-dateutil",
     "pydantic >= 2",
     "typing-extensions >= 4.7.1",
+    "httpx >= 0.23",
 ]
 
 setup(