diff --git a/poetry.lock b/poetry.lock
index 6b5c5b8..affaccb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -23,10 +23,10 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
-docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
+dev = ["coverage[toml] (>=5.0.2)", "furo", "hypothesis", "mypy", "pre-commit", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six", "sphinx", "sphinx-notfound-page", "zope.interface"]
+docs = ["furo", "sphinx", "sphinx-notfound-page", "zope.interface"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "mypy", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six", "zope.interface"]
+tests-no-zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "mypy", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "six"]
 
 [[package]]
 name = "black"
@@ -67,7 +67,7 @@ optional = false
 python-versions = ">=3.5.0"
 
 [package.extras]
-unicode_backport = ["unicodedata2"]
+unicode-backport = ["unicodedata2"]
 
 [[package]]
 name = "click"
@@ -115,10 +115,10 @@ pydantic = ">=1.6.2,<1.7 || >1.7,<1.7.1 || >1.7.1,<1.7.2 || >1.7.2,<1.7.3 || >1.
 starlette = "0.14.2"
 
 [package.extras]
-all = ["requests (>=2.24.0,<3.0.0)", "aiofiles (>=0.5.0,<0.6.0)", "jinja2 (>=2.11.2,<3.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "itsdangerous (>=1.1.0,<2.0.0)", "pyyaml (>=5.3.1,<6.0.0)", "graphene (>=2.1.8,<3.0.0)", "ujson (>=4.0.1,<5.0.0)", "orjson (>=3.2.1,<4.0.0)", "email_validator (>=1.1.1,<2.0.0)", "uvicorn[standard] (>=0.12.0,<0.14.0)", "async_exit_stack (>=1.0.1,<2.0.0)", "async_generator (>=1.10,<2.0.0)"]
-dev = ["python-jose[cryptography] (>=3.3.0,<4.0.0)", "passlib[bcrypt] (>=1.7.2,<2.0.0)", "autoflake (>=1.3.1,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)", "uvicorn[standard] (>=0.12.0,<0.14.0)", "graphene (>=2.1.8,<3.0.0)"]
-doc = ["mkdocs (>=1.1.2,<2.0.0)", "mkdocs-material (>=7.1.9,<8.0.0)", "mdx-include (>=1.4.1,<2.0.0)", "mkdocs-markdownextradata-plugin (>=0.1.7,<0.2.0)", "typer-cli (>=0.0.12,<0.0.13)", "pyyaml (>=5.3.1,<6.0.0)"]
-test = ["pytest (>=6.2.4,<7.0.0)", "pytest-cov (>=2.12.0,<3.0.0)", "pytest-asyncio (>=0.14.0,<0.15.0)", "mypy (==0.812)", "flake8 (>=3.8.3,<4.0.0)", "black (==20.8b1)", "isort (>=5.0.6,<6.0.0)", "requests (>=2.24.0,<3.0.0)", "httpx (>=0.14.0,<0.15.0)", "email_validator (>=1.1.1,<2.0.0)", "sqlalchemy (>=1.3.18,<1.4.0)", "peewee (>=3.13.3,<4.0.0)", "databases[sqlite] (>=0.3.2,<0.4.0)", "orjson (>=3.2.1,<4.0.0)", "ujson (>=4.0.1,<5.0.0)", "async_exit_stack (>=1.0.1,<2.0.0)", "async_generator (>=1.10,<2.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "aiofiles (>=0.5.0,<0.6.0)", "flask (>=1.1.2,<2.0.0)"]
+all = ["aiofiles (>=0.5.0,<0.6.0)", "async_exit_stack (>=1.0.1,<2.0.0)", "async_generator (>=1.10,<2.0.0)", "email_validator (>=1.1.1,<2.0.0)", "graphene (>=2.1.8,<3.0.0)", "itsdangerous (>=1.1.0,<2.0.0)", "jinja2 (>=2.11.2,<3.0.0)", "orjson (>=3.2.1,<4.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "pyyaml (>=5.3.1,<6.0.0)", "requests (>=2.24.0,<3.0.0)", "ujson (>=4.0.1,<5.0.0)", "uvicorn[standard] (>=0.12.0,<0.14.0)"]
+dev = ["autoflake (>=1.3.1,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)", "graphene (>=2.1.8,<3.0.0)", "passlib[bcrypt] (>=1.7.2,<2.0.0)", "python-jose[cryptography] (>=3.3.0,<4.0.0)", "uvicorn[standard] (>=0.12.0,<0.14.0)"]
+doc = ["mdx-include (>=1.4.1,<2.0.0)", "mkdocs (>=1.1.2,<2.0.0)", "mkdocs-markdownextradata-plugin (>=0.1.7,<0.2.0)", "mkdocs-material (>=7.1.9,<8.0.0)", "pyyaml (>=5.3.1,<6.0.0)", "typer-cli (>=0.0.12,<0.0.13)"]
+test = ["aiofiles (>=0.5.0,<0.6.0)", "async_exit_stack (>=1.0.1,<2.0.0)", "async_generator (>=1.10,<2.0.0)", "black (==20.8b1)", "databases[sqlite] (>=0.3.2,<0.4.0)", "email_validator (>=1.1.1,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)", "flask (>=1.1.2,<2.0.0)", "httpx (>=0.14.0,<0.15.0)", "isort (>=5.0.6,<6.0.0)", "mypy (==0.812)", "orjson (>=3.2.1,<4.0.0)", "peewee (>=3.13.3,<4.0.0)", "pytest (>=6.2.4,<7.0.0)", "pytest-asyncio (>=0.14.0,<0.15.0)", "pytest-cov (>=2.12.0,<3.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "requests (>=2.24.0,<3.0.0)", "sqlalchemy (>=1.3.18,<1.4.0)", "ujson (>=4.0.1,<5.0.0)"]
 
 [[package]]
 name = "idna"
@@ -245,17 +245,17 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-asyncio"
-version = "0.15.1"
-description = "Pytest support for asyncio."
+version = "0.20.2"
+description = "Pytest support for asyncio"
 category = "dev"
 optional = false
-python-versions = ">= 3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
-pytest = ">=5.4.0"
+pytest = ">=6.1.0"
 
 [package.extras]
-testing = ["coverage", "hypothesis (>=5.7.1)"]
+testing = ["coverage (>=6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy (>=0.931)", "pytest-trio (>=0.7.0)"]
 
 [[package]]
 name = "pytest-cov"
@@ -270,7 +270,7 @@ coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
 
 [[package]]
 name = "regex"
@@ -296,7 +296,7 @@ urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
-use_chardet_on_py3 = ["chardet (>=3.0.2,<5)"]
+use-chardet-on-py3 = ["chardet (>=3.0.2,<5)"]
 
 [[package]]
 name = "starlette"
@@ -343,13 +343,13 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
-secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)"]
 socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "ecd0e0efede3c812fefac55093b472704ea9eafb23e97cab263fd7b1cb32a604"
+content-hash = "7d801985f3a611a8c221c093825786edd29a1c8eaf3c69381d31f037be44ca74"
 
 [metadata.files]
 appdirs = [
@@ -425,9 +425,6 @@ coverage = [
     {file = "coverage-6.1.1-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:e14bceb1f3ae8a14374be2b2d7bc12a59226872285f91d66d301e5f41705d4d6"},
     {file = "coverage-6.1.1-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:0147f7833c41927d84f5af9219d9b32f875c0689e5e74ac8ca3cb61e73a698f9"},
     {file = "coverage-6.1.1-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:b1d0a1bce919de0dd8da5cff4e616b2d9e6ebf3bd1410ff645318c3dd615010a"},
-    {file = "coverage-6.1.1-cp39-cp39-musllinux_1_1_aarch64.whl", hash = "sha256:ae6de0e41f44794e68d23644636544ed8003ce24845f213b24de097cbf44997f"},
-    {file = "coverage-6.1.1-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:db2797ed7a7e883b9ab76e8e778bb4c859fc2037d6fd0644d8675e64d58d1653"},
-    {file = "coverage-6.1.1-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:c40966b683d92869b72ea3c11fd6b99a091fd30e12652727eca117273fc97366"},
     {file = "coverage-6.1.1-cp39-cp39-win32.whl", hash = "sha256:a11a2c019324fc111485e79d55907e7289e53d0031275a6c8daed30690bc50c0"},
     {file = "coverage-6.1.1-cp39-cp39-win_amd64.whl", hash = "sha256:4d8b453764b9b26b0dd2afb83086a7c3f9379134e340288d2a52f8a91592394b"},
     {file = "coverage-6.1.1-pp36-none-any.whl", hash = "sha256:3b270c6b48d3ff5a35deb3648028ba2643ad8434b07836782b1139cf9c66313f"},
@@ -525,8 +522,8 @@ pytest = [
     {file = "pytest-6.2.4.tar.gz", hash = "sha256:50bcad0a0b9c5a72c8e4e7c9855a3ad496ca6a881a3641b4260605450772c54b"},
 ]
 pytest-asyncio = [
-    {file = "pytest-asyncio-0.15.1.tar.gz", hash = "sha256:2564ceb9612bbd560d19ca4b41347b54e7835c2f792c504f698e05395ed63f6f"},
-    {file = "pytest_asyncio-0.15.1-py3-none-any.whl", hash = "sha256:3042bcdf1c5d978f6b74d96a151c4cfb9dcece65006198389ccd7e6c60eb1eea"},
+    {file = "pytest-asyncio-0.20.2.tar.gz", hash = "sha256:32a87a9836298a881c0ec637ebcc952cfe23a56436bdc0d09d1511941dd8a812"},
+    {file = "pytest_asyncio-0.20.2-py3-none-any.whl", hash = "sha256:07e0abf9e6e6b95894a39f688a4a875d63c2128f76c02d03d16ccbc35bcc0f8a"},
 ]
 pytest-cov = [
     {file = "pytest-cov-3.0.0.tar.gz", hash = "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"},
diff --git a/pyproject.toml b/pyproject.toml
index 3153477..963a3a6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ pydantic = ">=1.8.2"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.4"
-pytest-asyncio = "^0.15.1"
+pytest-asyncio = "^0.20.2"
 pytest-cov = "^3.0.0"
 mypy = "^0.910"
 black = "^21.6b0"