diff --git a/poetry.lock b/poetry.lock
index 82570e80b..b07de905d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1709,13 +1709,13 @@ files = [
 
 [[package]]
 name = "trio"
-version = "0.28.0"
+version = "0.29.0"
 description = "A friendly Python library for async concurrency and I/O"
 optional = false
 python-versions = ">=3.9"
 files = [
-    {file = "trio-0.28.0-py3-none-any.whl", hash = "sha256:56d58977acc1635735a96581ec70513cc781b8b6decd299c487d3be2a721cd94"},
-    {file = "trio-0.28.0.tar.gz", hash = "sha256:4e547896fe9e8a5658e54e4c7c5fa1db748cbbbaa7c965e7d40505b928c73c05"},
+    {file = "trio-0.29.0-py3-none-any.whl", hash = "sha256:d8c463f1a9cc776ff63e331aba44c125f423a5a13c684307e828d930e625ba66"},
+    {file = "trio-0.29.0.tar.gz", hash = "sha256:ea0d3967159fc130acb6939a0be0e558e364fee26b5deeecc893a6b08c361bdf"},
 ]
 
 [package.dependencies]
@@ -1778,4 +1778,4 @@ compatible-mypy = ["mypy"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "cd3a30071985ae742b43676d290fa3bb8a7b012eb0fa67758878c5522a6a91e9"
+content-hash = "06f77012bce60a83ddc78de1a42e6e9452e914dad35e7d0c16de2c0011cc8238"
diff --git a/pyproject.toml b/pyproject.toml
index 44788e62f..1f7c73ec3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ mypy = { version = ">=1.12,<1.16", optional = true }
 
 [tool.poetry.group.dev.dependencies]
 anyio = "^4.3"
-trio = "^0.28"
+trio = ">=0.28,<0.30"
 attrs = ">=24.2,<26.0"
 httpx = "^0.28"