diff --git a/poetry.lock b/poetry.lock
index 61e1447..8a177bf 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -184,16 +184,23 @@ testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtuale
 
 [[package]]
 name = "pytest-mypy"
-version = "0.7.0"
+version = "0.9.1"
 description = "Mypy static type checker plugin for Pytest"
 category = "dev"
 optional = false
 python-versions = ">=3.5"
 
 [package.dependencies]
+attrs = ">=19.0"
 filelock = ">=3.0"
-mypy = {version = ">=0.700", markers = "python_version >= \"3.8\""}
-pytest = ">=3.5"
+mypy = [
+    {version = ">=0.700", markers = "python_version >= \"3.8\" and python_version < \"3.9\""},
+    {version = ">=0.780", markers = "python_version >= \"3.9\""},
+]
+pytest = [
+    {version = ">=6.2", markers = "python_version >= \"3.10\""},
+    {version = ">=4.6", markers = "python_version >= \"3.6\" and python_version < \"3.10\""},
+]
 
 [[package]]
 name = "requests"
@@ -285,7 +292,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "a9e780692115af4268bd9ded797053cb9e2fb3f356ec51378ee57f4eb6da8ef3"
+content-hash = "5f6bc570c0e1780bcb1510eca12f198549c49054b3f674b2ff0f44d2348829ee"
 
 [metadata.files]
 atomicwrites = [
@@ -401,8 +408,8 @@ pytest-cov = [
     {file = "pytest_cov-2.12.1-py2.py3-none-any.whl", hash = "sha256:261bb9e47e65bd099c89c3edf92972865210c36813f80ede5277dceb77a4a62a"},
 ]
 pytest-mypy = [
-    {file = "pytest-mypy-0.7.0.tar.gz", hash = "sha256:5a667d9a2b66bf98b3a494411f221923a6e2c3eafbe771104951aaec8985673d"},
-    {file = "pytest_mypy-0.7.0-py3-none-any.whl", hash = "sha256:e0505ace48d2b19fe686366fce6b4a2ac0d090423736bb6aa2e39554d18974b7"},
+    {file = "pytest-mypy-0.9.1.tar.gz", hash = "sha256:9ffa3bf405c12c5c6be9e92e22bebb6ab2c91b9c32f45b0f0c93af473269ab5c"},
+    {file = "pytest_mypy-0.9.1-py3-none-any.whl", hash = "sha256:a2505fcf61f1c0c51f950d4623ea8ca2daf6fb2101a5603554bad2e130202083"},
 ]
 requests = [
     {file = "requests-2.26.0-py2.py3-none-any.whl", hash = "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24"},
diff --git a/pyproject.toml b/pyproject.toml
index ded37f9..73bc7cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ xmltodict = "^0.12.0"
 requests-mock = "^1.9.3"
 pytest = "^6.2.4"
 pytest-cov = "^2.12.1"
-pytest-mypy = "^0.7.0"
+pytest-mypy = "^0.9.1"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]