diff --git a/.readthedocs.yml b/.readthedocs.yml
index f282a39..2d12126 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,10 +8,13 @@ formats:
 build:
   os: ubuntu-22.04
   tools:
-    python: "3"
+    python: "3.13"
 
 python:
   install:
     - requirements: ci/rtd-requirements.txt
     - method: pip
       path: .
+
+sphinx:
+  configuration: docs/source/conf.py
diff --git a/ci/rtd-requirements.txt b/ci/rtd-requirements.txt
index 35b284d..5c83826 100644
--- a/ci/rtd-requirements.txt
+++ b/ci/rtd-requirements.txt
@@ -1,4 +1,4 @@
 # RTD is currently installing 1.5.3, which has a bug in :lineno-match:
-sphinx >= 4.0, < 6.2
+sphinx >= 6.0
 sphinx_rtd_theme
 sphinxcontrib-trio
diff --git a/tests/type_tests.py b/tests/type_tests.py
index c48b067..bb442de 100644
--- a/tests/type_tests.py
+++ b/tests/type_tests.py
@@ -117,8 +117,8 @@ def sync_capture_test() -> None:
     assert_type(capture(sync_one, 3.14), Union[Value[int], Error])
     assert_type(capture(sync_one, param=3.14), Union[Value[int], Error])
     assert_type(capture(sync_raises), Error)
-    capture(sync_one)  # type: ignore[arg-type, call-arg]
-    capture(sync_none, 1, 2)  # type: ignore[arg-type, call-arg]
+    capture(sync_one)  # type: ignore[call-overload]
+    capture(sync_none, 1, 2)  # type: ignore[call-overload]
 
 
 async def sync_gen_test() -> None:
@@ -172,8 +172,8 @@ async def async_capture_test() -> None:
         await acapture(async_one, param=3.14), Union[Value[int], Error]
     )
     assert_type(await acapture(async_raises), Error)
-    capture(async_one)  # type: ignore[arg-type, call-arg]
-    capture(async_none, 1, 2)  # type: ignore[arg-type, call-arg]
+    capture(async_one)  # type: ignore[call-overload]
+    capture(async_none, 1, 2)  # type: ignore[call-overload]
 
 
 async def async_gen_test() -> None: