diff --git a/pyproject.toml b/pyproject.toml
index 7b3b5304..b831f420 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "httpx>=0.23.0, <1",
     "pydantic>=1.9.0, <3",
     "typing-extensions>=4.5, <5",
-    "anyio>=3.5.0, <4",
+    "anyio>=3.5.0, <5",
     "distro>=1.7.0, <2",
     "sniffio",
 
@@ -49,7 +49,7 @@ dev-dependencies = [
     "pyright==1.1.332",
     "mypy==1.7.1",
     "black==23.3.0",
-    "respx==0.19.2",
+    "respx==0.20.2",
     "pytest==7.1.1",
     "pytest-asyncio==0.21.1",
     "ruff==0.0.282",
diff --git a/requirements-dev.lock b/requirements-dev.lock
index e7a2e23a..ce154682 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -8,7 +8,7 @@
 
 -e file:.
 annotated-types==0.6.0
-anyio==3.7.1
+anyio==4.1.0
 argcomplete==3.1.2
 attrs==23.1.0
 black==23.3.0
@@ -20,9 +20,9 @@ distlib==0.3.7
 distro==1.8.0
 exceptiongroup==1.1.3
 filelock==3.12.4
-h11==0.12.0
-httpcore==0.15.0
-httpx==0.23.0
+h11==0.14.0
+httpcore==1.0.2
+httpx==0.25.2
 idna==3.4
 iniconfig==2.0.0
 isort==5.10.1
@@ -41,8 +41,8 @@ pyright==1.1.332
 pytest==7.1.1
 pytest-asyncio==0.21.1
 python-dateutil==2.8.2
-respx==0.19.2
-rfc3986==1.5.0
+pytz==2023.3.post1
+respx==0.20.2
 ruff==0.0.282
 six==1.16.0
 sniffio==1.3.0
diff --git a/requirements.lock b/requirements.lock
index 0c8c2c2e..2022a5c5 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -8,16 +8,15 @@
 
 -e file:.
 annotated-types==0.6.0
-anyio==3.7.1
+anyio==4.1.0
 certifi==2023.7.22
 distro==1.8.0
 exceptiongroup==1.1.3
-h11==0.12.0
-httpcore==0.15.0
-httpx==0.23.0
+h11==0.14.0
+httpcore==1.0.2
+httpx==0.25.2
 idna==3.4
 pydantic==2.4.2
 pydantic-core==2.10.1
-rfc3986==1.5.0
 sniffio==1.3.0
 typing-extensions==4.8.0
diff --git a/tests/test_client.py b/tests/test_client.py
index 55502d8e..a37278e9 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -6,7 +6,7 @@
 import json
 import asyncio
 import inspect
-from typing import Any, Dict, Union, cast
+from typing import Any, Union, cast
 from unittest import mock
 
 import httpx
@@ -353,7 +353,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"my_query_param": "Foo"}
 
         # if both `query` and `extra_query` are given, they are merged
@@ -367,7 +367,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"bar": "1", "foo": "2"}
 
         # `extra_query` takes priority over `query` when keys clash
@@ -381,7 +381,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"foo": "2"}
 
     @pytest.mark.respx(base_url=base_url)
@@ -542,7 +542,9 @@ def test_transport_option_is_deprecated(self) -> None:
             DeprecationWarning,
             match="The `transport` argument is deprecated. The `http_client` argument should be passed instead",
         ):
-            transport = httpx.MockTransport(lambda: None)
+            transport = httpx.MockTransport(
+                lambda: None,  # type: ignore
+            )
 
             client = Finch(
                 base_url=base_url, access_token=access_token, _strict_response_validation=True, transport=transport
@@ -558,7 +560,9 @@ def test_transport_option_mutually_exclusive_with_http_client(self) -> None:
                         base_url=base_url,
                         access_token=access_token,
                         _strict_response_validation=True,
-                        transport=httpx.MockTransport(lambda: None),
+                        transport=httpx.MockTransport(
+                            lambda: None,  # type: ignore
+                        ),
                         http_client=http_client,
                     )
 
@@ -1057,7 +1061,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"my_query_param": "Foo"}
 
         # if both `query` and `extra_query` are given, they are merged
@@ -1071,7 +1075,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"bar": "1", "foo": "2"}
 
         # `extra_query` takes priority over `query` when keys clash
@@ -1085,7 +1089,7 @@ def test_request_extra_query(self) -> None:
                 ),
             ),
         )
-        params = cast(Dict[str, str], dict(request.url.params))
+        params = dict(request.url.params)
         assert params == {"foo": "2"}
 
     @pytest.mark.respx(base_url=base_url)
@@ -1246,7 +1250,9 @@ def test_transport_option_is_deprecated(self) -> None:
             DeprecationWarning,
             match="The `transport` argument is deprecated. The `http_client` argument should be passed instead",
         ):
-            transport = httpx.MockTransport(lambda: None)
+            transport = httpx.MockTransport(
+                lambda: None,  # type: ignore
+            )
 
             client = AsyncFinch(
                 base_url=base_url, access_token=access_token, _strict_response_validation=True, transport=transport
@@ -1262,7 +1268,9 @@ async def test_transport_option_mutually_exclusive_with_http_client(self) -> Non
                         base_url=base_url,
                         access_token=access_token,
                         _strict_response_validation=True,
-                        transport=httpx.MockTransport(lambda: None),
+                        transport=httpx.MockTransport(
+                            lambda: None,  # type: ignore
+                        ),
                         http_client=http_client,
                     )