diff --git a/docs/intro.rst b/docs/intro.rst
index f47166f6..a4281abb 100644
--- a/docs/intro.rst
+++ b/docs/intro.rst
@@ -51,7 +51,7 @@ The corresponding between extra dependencies required and the GQL classes is:
 +---------------------+------------------------------------------------------------------+
 | requests            | :ref:`RequestsHTTPTransport <requests_transport>`                |
 +---------------------+------------------------------------------------------------------+
-| httpx               | :ref:`HTTPTXTransport <httpx_transport>`                         |
+| httpx2 or httpx     | :ref:`HTTPTXTransport <httpx_transport>`                         |
 |                     |                                                                  |
 |                     | :ref:`HTTPXAsyncTransport <httpx_async_transport>`               |
 +---------------------+------------------------------------------------------------------+
diff --git a/docs/transports/httpx.rst b/docs/transports/httpx.rst
index 25796621..7058b198 100644
--- a/docs/transports/httpx.rst
+++ b/docs/transports/httpx.rst
@@ -3,7 +3,7 @@
 HTTPXTransport
 ==============
 
-The HTTPXTransport is a sync transport using the `httpx`_ library
+The HTTPXTransport is a sync transport using the `httpx2`_ or  `httpx`_ library
 and allows you to send GraphQL queries using the HTTP protocol.
 
 Reference: :class:`gql.transport.httpx.HTTPXTransport`
@@ -11,3 +11,4 @@ Reference: :class:`gql.transport.httpx.HTTPXTransport`
 .. literalinclude:: ../code_examples/httpx_sync.py
 
 .. _httpx: https://www.python-httpx.org
+.. _httpx2: https://httpx2.pydantic.dev
diff --git a/docs/transports/httpx_async.rst b/docs/transports/httpx_async.rst
index c09d0cdc..2da0f204 100644
--- a/docs/transports/httpx_async.rst
+++ b/docs/transports/httpx_async.rst
@@ -3,7 +3,7 @@
 HTTPXAsyncTransport
 ===================
 
-This transport uses the `httpx`_ library and allows you to send GraphQL queries using the HTTP protocol.
+This transport uses the `httpx2`_ or `httpx`_ library and allows you to send GraphQL queries using the HTTP protocol.
 
 Reference: :class:`gql.transport.httpx.HTTPXAsyncTransport`
 
@@ -37,3 +37,4 @@ You can manually set the cookies which will be sent with each connection:
     transport = HTTPXAsyncTransport(url=url, cookies={"cookie1": "val1"})
 
 .. _httpx: https://www.python-httpx.org
+.. _httpx2: https://httpx2.pydantic.dev
diff --git a/gql/transport/httpx.py b/gql/transport/httpx.py
index 7143f263..fb0688b9 100644
--- a/gql/transport/httpx.py
+++ b/gql/transport/httpx.py
@@ -14,7 +14,11 @@
     Union,
 )
 
-import httpx
+try:
+    import httpx2 as httpx
+except ModuleNotFoundError:  # pragma: no cover
+    import httpx  # type: ignore[no-redef]
+
 from graphql import ExecutionResult
 
 from ..graphql_request import GraphQLRequest
diff --git a/setup.py b/setup.py
index af1d6a56..d7e9a926 100644
--- a/setup.py
+++ b/setup.py
@@ -52,6 +52,10 @@
     "httpx>=0.27.0,<1",
 ]
 
+install_httpx2_requires = [
+    "httpx2>=2.0.0,<3",
+]
+
 install_websockets_requires = [
     "websockets>=14.2,<16",
 ]
@@ -65,7 +69,7 @@
 ]
 
 install_all_requires = (
-    install_aiohttp_requires + install_requests_requires + install_httpx_requires + install_websockets_requires + install_botocore_requires + install_aiofiles_requires
+    install_aiohttp_requires + install_requests_requires + install_httpx2_requires + install_websockets_requires + install_botocore_requires + install_aiofiles_requires
 )
 
 # Get version from __version__.py file
@@ -110,6 +114,7 @@
         "aiohttp": install_aiohttp_requires,
         "requests": install_requests_requires,
         "httpx": install_httpx_requires,
+        "httpx2": install_httpx2_requires,
         "websockets": install_websockets_requires,
         "botocore": install_botocore_requires,
         "aiofiles": install_aiofiles_requires,
diff --git a/tests/test_httpx.py b/tests/test_httpx.py
index aa25edc2..88612464 100644
--- a/tests/test_httpx.py
+++ b/tests/test_httpx.py
@@ -216,19 +216,24 @@ def test_code():
 
         query = gql(query1_str)
 
-        expected_error = "certificate verify failed: self-signed certificate"
+        expected_errors = [
+            # Linux / OpenSSL error message
+            "certificate verify failed: self-signed certificate",
+            # Windows error message
+            "not trusted by the trust provider",
+        ]
 
         with pytest.raises(TransportConnectionFailed) as exc_info:
             with Client(transport=transport) as session:
                 session.execute(query)
 
-        assert expected_error in str(exc_info.value)
+        assert any(err in str(exc_info.value) for err in expected_errors)
 
         with pytest.raises(TransportConnectionFailed) as exc_info:
             with Client(transport=transport) as session:
                 session.execute_batch([query])
 
-        assert expected_error in str(exc_info.value)
+        assert any(err in str(exc_info.value) for err in expected_errors)
 
     await run_sync_test(server, test_code)
 
diff --git a/tests/test_httpx_async.py b/tests/test_httpx_async.py
index 278d3c46..5effea79 100644
--- a/tests/test_httpx_async.py
+++ b/tests/test_httpx_async.py
@@ -436,7 +436,11 @@ async def handler(request):
 @pytest.mark.aiohttp
 @pytest.mark.asyncio
 async def test_httpx_extra_args(aiohttp_server):
-    import httpx
+    try:
+        import httpx2 as httpx
+    except ModuleNotFoundError:  # pragma: no cover
+        import httpx  # type: ignore[no-redef]
+
     from aiohttp import web
 
     from gql.transport.httpx import HTTPXAsyncTransport
@@ -1179,19 +1183,24 @@ async def handler(request):
 
     query = gql(query1_str)
 
-    expected_error = "certificate verify failed: self-signed certificate"
+    expected_errors = [
+        # Linux / OpenSSL error message
+        "certificate verify failed: self-signed certificate",
+        # Windows error message
+        "not trusted by the trust provider",
+    ]
 
     with pytest.raises(TransportConnectionFailed) as exc_info:
         async with Client(transport=transport) as session:
             await session.execute(query)
 
-    assert expected_error in str(exc_info.value)
+    assert any(err in str(exc_info.value) for err in expected_errors)
 
     with pytest.raises(TransportConnectionFailed) as exc_info:
         async with Client(transport=transport) as session:
             await session.execute_batch([query])
 
-    assert expected_error in str(exc_info.value)
+    assert any(err in str(exc_info.value) for err in expected_errors)
 
 
 @pytest.mark.aiohttp
diff --git a/tests/test_httpx_batch.py b/tests/test_httpx_batch.py
index 2f05df99..9e42d432 100644
--- a/tests/test_httpx_batch.py
+++ b/tests/test_httpx_batch.py
@@ -325,7 +325,11 @@ async def handler(request):
 @pytest.mark.aiohttp
 @pytest.mark.asyncio
 async def test_httpx_async_batch_extra_args(aiohttp_server):
-    import httpx
+    try:
+        import httpx2 as httpx
+    except ModuleNotFoundError:  # pragma: no cover
+        import httpx  # type: ignore[no-redef]
+
     from aiohttp import web
 
     from gql.transport.httpx import HTTPXAsyncTransport