diff --git a/requirements.txt b/requirements.txt
index df1fcd97..81bc992e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ isort==5.12.0; python_version>='3.8'
 mypy==0.982
 types-certifi==2021.10.8.2
 pytest==7.2.0
-trio==0.21.0
+trio==0.22.0
 trio-typing==0.7.0
 trustme==0.9.0
 uvicorn==0.20.0
diff --git a/setup.cfg b/setup.cfg
index d9b822c1..c0bb07dd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,6 +19,8 @@ addopts = -rxXs
 filterwarnings =
   error
   ignore: You seem to already have a custom sys.excepthook handler installed. I'll skip installing Trio's custom handler, but this means MultiErrors will not show full tracebacks.:RuntimeWarning
+  # See: https://github.com/agronholm/anyio/issues/508
+  ignore: trio\.MultiError is deprecated since Trio 0\.22\.0:trio.TrioDeprecationWarning
 markers =
   copied_from(source, changes=None): mark test as copied from somewhere else, along with a description of changes made to accodomate e.g. our test setup
   network: marks tests which require network connection. Used in 3rd-party build environments that have network disabled.