diff --git a/poetry.lock b/poetry.lock
index b30c7ff1..842ef1e2 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -784,13 +784,13 @@ testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "no
 
 [[package]]
 name = "pytest-asyncio"
-version = "0.21.0"
+version = "0.21.1"
 description = "Pytest support for asyncio"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pytest-asyncio-0.21.0.tar.gz", hash = "sha256:2b38a496aef56f56b0e87557ec313e11e1ab9276fc3863f6a7be0f1d0e415e1b"},
-    {file = "pytest_asyncio-0.21.0-py3-none-any.whl", hash = "sha256:f2b3366b7cd501a4056858bd39349d5af19742aed2d81660b7998b6341c7eb9c"},
+    {file = "pytest-asyncio-0.21.1.tar.gz", hash = "sha256:40a7eae6dded22c7b604986855ea48400ab15b069ae38116e8c01238e9eeb64d"},
+    {file = "pytest_asyncio-0.21.1-py3-none-any.whl", hash = "sha256:8666c1c8ac02631d7c51ba282e0c69a8a452b211ffedf2599099845da5c5c37b"},
 ]
 
 [package.dependencies]
@@ -1274,4 +1274,4 @@ ws = ["websockets"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8"
-content-hash = "24c73f352815a40a121eb14a93183b1b257d33ea4cfc92908eaa303d62d36d92"
+content-hash = "ab1b8b368f59bc08732b90a11a3082fc4659bf16b737b0406ef2647e6a88bc52"
diff --git a/pyproject.toml b/pyproject.toml
index 9ad181da..ca1d9465 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ readme = "README.md"
 # See https://github.com/MousaZeidBaker/poetry-plugin-up
 [tool.poetry.dependencies]
 python = ">=3.8"
+cattrs = ">=23.1.2"
 lsprotocol = "2023.0.0"
 websockets = { version = ">=11.0.3", optional = true }
 
@@ -38,8 +39,7 @@ black = ">=23.11.0"
 # Note: `coverage` requires that your Python was built with system `sqlite` development files
 coverage = { version = ">=7.3.2", extras = ["toml"] }
 pytest = ">=7.4.3"
-# TODO: tests freeze on v0.21.1
-pytest-asyncio = "0.21.0"
+pytest-asyncio = ">=0.21.0"
 
 [tool.poetry.group.docs.dependencies]
 # TODO `sphinx>=7.26` needs python 3.9