diff --git a/poetry.lock b/poetry.lock
index 44c1e1af..99fe23aa 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1908,14 +1908,14 @@ files = [
 
 [[package]]
 name = "trio"
-version = "0.30.0"
+version = "0.31.0"
 description = "A friendly Python library for async concurrency and I/O"
 optional = false
 python-versions = ">=3.9"
 groups = ["dev"]
 files = [
-    {file = "trio-0.30.0-py3-none-any.whl", hash = "sha256:3bf4f06b8decf8d3cf00af85f40a89824669e2d033bb32469d34840edcfc22a5"},
-    {file = "trio-0.30.0.tar.gz", hash = "sha256:0781c857c0c81f8f51e0089929a26b5bb63d57f927728a5586f7e36171f064df"},
+    {file = "trio-0.31.0-py3-none-any.whl", hash = "sha256:b5d14cd6293d79298b49c3485ffd9c07e3ce03a6da8c7dfbe0cb3dd7dc9a4774"},
+    {file = "trio-0.31.0.tar.gz", hash = "sha256:f71d551ccaa79d0cb73017a33ef3264fde8335728eb4c6391451fe5d253a9d5b"},
 ]
 
 [package.dependencies]
@@ -1981,4 +1981,4 @@ compatible-mypy = ["mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.10"
-content-hash = "cab422c4f8cd396d7e5d55a34bbfbf50e4359ff0218eee09a3954868c8bbb3c3"
+content-hash = "5cff5812ec5cdc69393c70db8f76b5fbd6e1d0e72ff18991cc945f559d0bb8dc"
diff --git a/pyproject.toml b/pyproject.toml
index ccc77422..ff4e0158 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,7 +56,7 @@ mypy = { version = ">=1.12,<1.18", optional = true }
 
 [tool.poetry.group.dev.dependencies]
 anyio = "^4.3"
-trio = "^0.30"
+trio = ">=0.30,<0.32"
 attrs = "^25.3"
 httpx = "^0.28"