diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ea83ae1..c3495a9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ on:
     branches:
       - master
     tags:
-      - 'v*.*.*'
+      - "v*.*.*"
   pull_request:
     branches:
       - master
@@ -15,58 +15,57 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8' ]
-        postgres-version: [ '9.6', '12.1' ]
+        python-version: ["3.6", "3.7", "3.8", "3.9"]
+        postgres-version: ["9.6", "12.1"]
     services:
       postgres:
         image: fantix/postgres-ssl:${{ matrix.postgres-version }}
         env:
           POSTGRES_USER: gino
         ports:
-        - 5432:5432
+          - 5432:5432
         # needed because the postgres container does not provide a healthcheck
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
-    - name: Checkout source code
-      uses: actions/checkout@v1
-    - name: Set up Python
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: virtualenv cache
-      uses: actions/cache@preview
-      with:
-        path: ~/.cache/pypoetry/virtualenvs
-        key: ${{ runner.os }}-${{ matrix.python-version }}-poetry-${{ hashFiles(format('{0}{1}', github.workspace, '/poetry.lock')) }}
-        restore-keys: |
-          ${{ runner.os }}-${{ matrix.python-version }}-poetry-
-    - name: Install Python dependencies
-      run: |
-        curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
-        $HOME/.poetry/bin/poetry install
-    - name: Test with pytest
-      env:
-        DB_HOST: localhost
-        DB_USER: gino
-      run: |
-        $HOME/.poetry/bin/poetry run pytest --cov=src --cov=examples --cov-fail-under=95 --cov-report xml
-    - name: Check code format with black
-      if: matrix.python-version >= '3.6'
-      run: |
+      - name: Checkout source code
+        uses: actions/checkout@v1
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: virtualenv cache
+        uses: actions/cache@preview
+        with:
+          path: ~/.cache/pypoetry/virtualenvs
+          key: ${{ runner.os }}-${{ matrix.python-version }}-poetry-${{ hashFiles(format('{0}{1}', github.workspace, '/poetry.lock')) }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.python-version }}-poetry-
+      - name: Install Python dependencies
+        run: |
+          curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
+          $HOME/.poetry/bin/poetry install
+      - name: Test with pytest
+        env:
+          DB_HOST: localhost
+          DB_USER: gino
+        run: |
+          $HOME/.poetry/bin/poetry run pytest --cov=src --cov=examples --cov-fail-under=95 --cov-report xml
+      - name: Check code format with black
+        run: |
           $HOME/.poetry/bin/poetry run black --check src
-    - name: Submit coverage report
-      if: matrix.python-version == '3.8' && matrix.postgres-version == '12.1' && github.ref == 'refs/heads/master'
-      env:
-        CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_TOKEN }}
-      run: |
-        pip install codacy-coverage
-        python-codacy-coverage -r coverage.xml
+      - name: Submit coverage report
+        if: matrix.python-version == '3.8' && matrix.postgres-version == '12.1' && github.ref == 'refs/heads/master'
+        env:
+          CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_TOKEN }}
+        run: |
+          pip install codacy-coverage
+          python-codacy-coverage -r coverage.xml
   release:
     runs-on: ubuntu-latest
     needs: test
     strategy:
       matrix:
-        python-version: [ '3.8' ]
+        python-version: ["3.8"]
     steps:
       - name: Checkout source code
         if: startsWith(github.ref, 'refs/tags/')
diff --git a/poetry.lock b/poetry.lock
index 11f36b2..ca8ba31 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,365 +1,451 @@
 [[package]]
-category = "main"
-description = "File support for asyncio."
 name = "aiofiles"
+version = "0.7.0"
+description = "File support for asyncio."
+category = "main"
+optional = false
+python-versions = ">=3.6,<4.0"
+
+[[package]]
+name = "aiomysql"
+version = "0.0.20"
+description = "MySQL driver for asyncio."
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.5.0"
+
+[package.dependencies]
+PyMySQL = ">=0.9,<=0.9.2"
+
+[package.extras]
+sa = ["sqlalchemy (>=1.0)"]
 
 [[package]]
-category = "dev"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-marker = "python_version >= \"3.6\""
 name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.3"
 
 [[package]]
-category = "main"
-description = "An asyncio PostgreSQL driver"
 name = "asyncpg"
+version = "0.23.0"
+description = "An asyncio PostgreSQL driver"
+category = "main"
 optional = false
 python-versions = ">=3.5.0"
-version = "0.20.1"
+
+[package.dependencies]
+typing-extensions = {version = ">=3.7.4.3", markers = "python_version < \"3.8\""}
 
 [package.extras]
-dev = ["Cython (0.29.14)", "pytest (>=3.6.0)", "Sphinx (>=1.7.3,<1.8.0)", "sphinxcontrib-asyncio (>=0.2.0,<0.3.0)", "sphinx-rtd-theme (>=0.2.4,<0.3.0)", "pycodestyle (>=2.5.0,<2.6.0)", "flake8 (>=3.7.9,<3.8.0)", "uvloop (>=0.14.0,<0.15.0)"]
+dev = ["Cython (>=0.29.20,<0.30.0)", "pytest (>=3.6.0)", "Sphinx (>=1.7.3,<1.8.0)", "sphinxcontrib-asyncio (>=0.2.0,<0.3.0)", "sphinx-rtd-theme (>=0.2.4,<0.3.0)", "pycodestyle (>=2.5.0,<2.6.0)", "flake8 (>=3.7.9,<3.8.0)", "uvloop (>=0.14.0,<0.15.0)"]
 docs = ["Sphinx (>=1.7.3,<1.8.0)", "sphinxcontrib-asyncio (>=0.2.0,<0.3.0)", "sphinx-rtd-theme (>=0.2.4,<0.3.0)"]
 test = ["pycodestyle (>=2.5.0,<2.6.0)", "flake8 (>=3.7.9,<3.8.0)", "uvloop (>=0.14.0,<0.15.0)"]
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.3.0"
 
 [[package]]
-category = "dev"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "21.2.0"
+description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+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"]
 
 [[package]]
-category = "dev"
-description = "The uncompromising code formatter."
-marker = "python_version >= \"3.6\""
 name = "black"
+version = "20.8b1"
+description = "The uncompromising code formatter."
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "19.10b0"
 
 [package.dependencies]
 appdirs = "*"
-attrs = ">=18.1.0"
-click = ">=6.5"
+click = ">=7.1.2"
+dataclasses = {version = ">=0.6", markers = "python_version < \"3.7\""}
+mypy-extensions = ">=0.4.3"
 pathspec = ">=0.6,<1"
-regex = "*"
-toml = ">=0.9.4"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
 typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
 
 [package.extras]
+colorama = ["colorama (>=0.4.3)"]
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
-category = "main"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2021.5.30"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2020.4.5.1"
 
 [[package]]
+name = "cffi"
+version = "1.14.5"
+description = "Foreign Function Interface for Python calling C code."
 category = "main"
-description = "Universal encoding detector for Python 2 and 3"
-name = "chardet"
 optional = false
 python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
+[[package]]
+name = "chardet"
 version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = "*"
 
 [[package]]
-category = "dev"
-description = "Composable command line interface toolkit"
-marker = "python_version >= \"3.6\""
 name = "click"
+version = "8.0.1"
+description = "Composable command line interface toolkit"
+category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "7.1.1"
+python-versions = ">=3.6"
+
+[package.dependencies]
+colorama = {version = "*", markers = "platform_system == \"Windows\""}
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 
 [[package]]
-category = "dev"
-description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
 name = "colorama"
+version = "0.4.4"
+description = "Cross-platform colored terminal text."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "main"
-description = "PEP 567 Backport"
-marker = "python_version < \"3.7\""
 name = "contextvars"
+version = "2.4"
+description = "PEP 567 Backport"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2.4"
 
 [package.dependencies]
 immutables = ">=0.9"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.5"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.1"
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
+name = "cryptography"
+version = "3.4.7"
+description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 category = "main"
-description = "GINO Is Not ORM - a Python asyncio ORM on SQLAlchemy core."
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.12"
+
+[package.extras]
+docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
+docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
+pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["pytest (>=6.0)", "pytest-cov", "pytest-subtests", "pytest-xdist", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+
+[[package]]
+name = "dataclasses"
+version = "0.8"
+description = "A backport of the dataclasses module for Python 3.6"
+category = "dev"
+optional = false
+python-versions = ">=3.6, <3.7"
+
+[[package]]
 name = "gino"
+version = "1.1.0b2"
+description = "GINO Is Not ORM - a Python asyncio ORM on SQLAlchemy core."
+category = "main"
 optional = false
 python-versions = ">=3.5,<4.0"
-version = "1.0.0rc4"
 
 [package.dependencies]
-SQLAlchemy = ">=1.2,<2.0"
+aiomysql = ">=0.0.20,<0.0.21"
 asyncpg = ">=0.18,<1.0"
-
-[package.dependencies.contextvars]
-python = "<3.7"
-version = ">=2.4,<3.0"
-
-[package.dependencies.importlib_metadata]
-python = "<3.8"
-version = ">=1.3.0,<2.0.0"
+contextvars = {version = ">=2.4,<3.0", markers = "python_version < \"3.7\""}
+importlib_metadata = {version = ">=1.3.0,<2.0.0", markers = "python_version < \"3.8\""}
+mysqlclient = ">=1.4,<2.0"
+SQLAlchemy = ">=1.3,<1.4"
 
 [package.extras]
 starlette = ["gino-starlette (>=0.1.1,<0.2.0)"]
+aiohttp = ["gino-aiohttp (>=0.2.0,<0.3.0)"]
+tornado = ["gino-tornado (>=0.1.0,<0.2.0)"]
+sanic = ["gino-sanic (>=0.1.0,<0.2.0)"]
+quart = ["gino-quart (>=0.1.0,<0.2.0)"]
 
 [[package]]
-category = "main"
-description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
 name = "h11"
+version = "0.9.0"
+description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.8.1"
 
 [[package]]
-category = "main"
-description = "HTTP/2 State-Machine based protocol implementation"
 name = "h2"
+version = "3.2.0"
+description = "HTTP/2 State-Machine based protocol implementation"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.2.0"
 
 [package.dependencies]
 hpack = ">=3.0,<4"
 hyperframe = ">=5.2.0,<6"
 
 [[package]]
-category = "main"
-description = "Pure-Python HPACK header compression"
 name = "hpack"
+version = "3.0.0"
+description = "Pure-Python HPACK header compression"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.0.0"
 
 [[package]]
-category = "main"
-description = "Chromium HSTS Preload list as a Python package and updated daily"
 name = "hstspreload"
+version = "2020.12.22"
+description = "Chromium HSTS Preload list as a Python package"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "2020.4.14"
 
 [[package]]
-category = "main"
-description = "A collection of framework independent HTTP protocol utils."
 name = "httptools"
+version = "0.2.0"
+description = "A collection of framework independent HTTP protocol utils."
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.1.1"
 
 [package.extras]
-test = ["Cython (0.29.14)"]
+test = ["Cython (==0.29.22)"]
 
 [[package]]
-category = "main"
-description = "The next generation HTTP client."
 name = "httpx"
+version = "0.11.1"
+description = "The next generation HTTP client."
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "0.9.3"
 
 [package.dependencies]
 certifi = "*"
 chardet = ">=3.0.0,<4.0.0"
-h11 = ">=0.8.0,<0.9.0"
+h11 = ">=0.8,<0.10"
 h2 = ">=3.0.0,<4.0.0"
 hstspreload = "*"
 idna = ">=2.0.0,<3.0.0"
 rfc3986 = ">=1.3,<2"
 sniffio = ">=1.0.0,<2.0.0"
+urllib3 = ">=1.0.0,<2.0.0"
 
 [[package]]
-category = "main"
-description = "HTTP/2 framing layer for Python"
 name = "hyperframe"
+version = "5.2.0"
+description = "HTTP/2 framing layer for Python"
+category = "main"
 optional = false
 python-versions = "*"
-version = "5.2.0"
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.9"
 
 [[package]]
-category = "main"
-description = "Immutable Collections"
-marker = "python_version < \"3.7\""
 name = "immutables"
+version = "0.15"
+description = "Immutable Collections"
+category = "main"
 optional = false
-python-versions = "*"
-version = "0.11"
+python-versions = ">=3.5"
+
+[package.extras]
+test = ["flake8 (>=3.8.4,<3.9.0)", "pycodestyle (>=2.6.0,<2.7.0)"]
 
 [[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.7.0"
+description = "Read metadata from Python packages"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.6.0"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
+testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "8.8.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "8.2.0"
 
 [[package]]
-category = "main"
-description = "multidict implementation"
 name = "multidict"
+version = "4.7.6"
+description = "multidict implementation"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "4.7.5"
 
 [[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
 category = "dev"
-description = "Core utilities for Python packages"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "mysqlclient"
+version = "1.4.6"
+description = "Python interface to MySQL"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
 name = "packaging"
+version = "20.9"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.3"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
-six = "*"
 
 [[package]]
-category = "dev"
-description = "Utility library for gitignore style pattern matching of file paths."
-marker = "python_version >= \"3.6\""
 name = "pathspec"
+version = "0.8.1"
+description = "Utility library for gitignore style pattern matching of file paths."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.8.0"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.10.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.1"
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
+name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pymysql"
+version = "0.9.2"
+description = "Pure Python MySQL Driver"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+cryptography = "*"
+
+[[package]]
 name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.7"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "5.4.3"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "5.4.1"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 more-itertools = ">=4.0.0"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
 py = ">=1.5.0"
 wcwidth = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa-mypy = ["mypy (v0.761)"]
+checkqa-mypy = ["mypy (==v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "Pytest support for asyncio."
 name = "pytest-asyncio"
+version = "0.10.0"
+description = "Pytest support for asyncio."
+category = "dev"
 optional = false
 python-versions = ">= 3.5"
-version = "0.10.0"
 
 [package.dependencies]
 pytest = ">=3.0.6"
@@ -368,91 +454,92 @@ pytest = ">=3.0.6"
 testing = ["async-generator (>=1.3)", "coverage", "hypothesis (>=3.64)"]
 
 [[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
+version = "2.12.1"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8.1"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-coverage = ">=4.4"
-pytest = ">=3.6"
+coverage = ">=5.2.1"
+pytest = ">=4.6"
+toml = "*"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "virtualenv"]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
 
 [[package]]
+name = "pytest-pythonpath"
+version = "0.7.3"
+description = "pytest plugin for adding to the PYTHONPATH from command line or configs."
 category = "dev"
-description = "Alternative regular expression module, to replace re."
-marker = "python_version >= \"3.6\""
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pytest = ">=2.5.2"
+
+[[package]]
 name = "regex"
+version = "2021.7.1"
+description = "Alternative regular expression module, to replace re."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2020.4.4"
 
 [[package]]
-category = "main"
-description = "Validating URI References per RFC 3986"
 name = "rfc3986"
+version = "1.5.0"
+description = "Validating URI References per RFC 3986"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.4.0"
 
 [package.extras]
 idna2008 = ["idna"]
 
 [[package]]
-category = "main"
-description = "A web server and web framework that's written to go fast. Build fast. Run fast."
 name = "sanic"
+version = "20.3.0"
+description = "A web server and web framework that's written to go fast. Build fast. Run fast."
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "19.12.2"
 
 [package.dependencies]
 aiofiles = ">=0.3.0"
 httptools = ">=0.0.10"
-httpx = "0.9.3"
+httpx = "0.11.1"
 multidict = ">=4.0,<5.0"
-ujson = ">=1.35"
-uvloop = ">=0.5.3"
+ujson = {version = ">=1.35", markers = "sys_platform != \"win32\" and implementation_name == \"cpython\""}
+uvloop = {version = ">=0.5.3", markers = "sys_platform != \"win32\" and implementation_name == \"cpython\""}
 websockets = ">=7.0,<9.0"
 
 [package.extras]
-all = ["pytest (5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "aiofiles", "tox", "black", "flake8", "bandit", "towncrier", "sphinx (>=2.1.2)", "sphinx-rtd-theme", "recommonmark (>=0.5.0)", "docutils", "pygments", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
-dev = ["pytest (5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "aiofiles", "tox", "black", "flake8", "bandit", "towncrier", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
+all = ["pytest (==5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (==0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "aiofiles", "tox", "black", "flake8", "bandit", "towncrier", "sphinx (>=2.1.2)", "sphinx-rtd-theme", "recommonmark (>=0.5.0)", "docutils", "pygments", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
+dev = ["pytest (==5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (==0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "aiofiles", "tox", "black", "flake8", "bandit", "towncrier", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
 docs = ["sphinx (>=2.1.2)", "sphinx-rtd-theme", "recommonmark (>=0.5.0)", "docutils", "pygments"]
-test = ["pytest (5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
+test = ["pytest (==5.2.1)", "multidict (>=4.0,<5.0)", "gunicorn", "pytest-cov", "httpcore (==0.3.0)", "beautifulsoup4", "pytest-sanic", "pytest-sugar", "pytest-benchmark", "uvloop (>=0.5.3)", "ujson (>=1.35)"]
 
 [[package]]
-category = "dev"
-description = "Python 2 and 3 compatibility utilities"
-name = "six"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.14.0"
-
-[[package]]
-category = "main"
-description = "Sniff out which async library your code is running under"
 name = "sniffio"
+version = "1.2.0"
+description = "Sniff out which async library your code is running under"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "1.1.0"
 
 [package.dependencies]
-[package.dependencies.contextvars]
-python = "<3.7"
-version = ">=2.1"
+contextvars = {version = ">=2.1", markers = "python_version < \"3.7\""}
 
 [[package]]
-category = "main"
-description = "Database Abstraction Library"
 name = "sqlalchemy"
+version = "1.3.24"
+description = "Database Abstraction Library"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.3.16"
 
 [package.extras]
 mssql = ["pyodbc"]
@@ -461,183 +548,288 @@ mssql_pyodbc = ["pyodbc"]
 mysql = ["mysqlclient"]
 oracle = ["cx-oracle"]
 postgresql = ["psycopg2"]
-postgresql_pg8000 = ["pg8000"]
+postgresql_pg8000 = ["pg8000 (<1.16.6)"]
 postgresql_psycopg2binary = ["psycopg2-binary"]
 postgresql_psycopg2cffi = ["psycopg2cffi"]
-pymysql = ["pymysql"]
+pymysql = ["pymysql (<1)", "pymysql"]
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
-marker = "python_version >= \"3.6\""
 name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
-python-versions = "*"
-version = "0.10.0"
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
-category = "dev"
-description = "a fork of Python 2 and 3 ast modules with type comment support"
-marker = "python_version >= \"3.6\""
 name = "typed-ast"
+version = "1.4.3"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.1"
 
 [[package]]
+name = "typing-extensions"
+version = "3.10.0.0"
+description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "main"
-description = "Ultra fast JSON encoder and decoder for Python"
-marker = "sys_platform != \"win32\" and implementation_name == \"cpython\""
+optional = false
+python-versions = "*"
+
+[[package]]
 name = "ujson"
+version = "4.0.2"
+description = "Ultra fast JSON encoder and decoder for Python"
+category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.0.3"
+python-versions = ">=3.6"
 
 [[package]]
+name = "urllib3"
+version = "1.26.6"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "main"
-description = "Fast implementation of asyncio event loop on top of libuv"
-marker = "sys_platform != \"win32\" and implementation_name == \"cpython\""
+optional = false
+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"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
+[[package]]
 name = "uvloop"
+version = "0.14.0"
+description = "Fast implementation of asyncio event loop on top of libuv"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.14.0"
 
 [[package]]
-category = "dev"
-description = "Measures number of Terminal column cells of wide-character codes"
+name = "uvloop"
+version = "0.15.2"
+description = "Fast implementation of asyncio event loop on top of libuv"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+dev = ["Cython (>=0.29.20,<0.30.0)", "pytest (>=3.6.0)", "Sphinx (>=1.7.3,<1.8.0)", "sphinxcontrib-asyncio (>=0.2.0,<0.3.0)", "sphinx-rtd-theme (>=0.2.4,<0.3.0)", "aiohttp", "flake8 (>=3.8.4,<3.9.0)", "psutil", "pycodestyle (>=2.6.0,<2.7.0)", "pyOpenSSL (>=19.0.0,<19.1.0)", "mypy (>=0.800)"]
+docs = ["Sphinx (>=1.7.3,<1.8.0)", "sphinxcontrib-asyncio (>=0.2.0,<0.3.0)", "sphinx-rtd-theme (>=0.2.4,<0.3.0)"]
+test = ["aiohttp", "flake8 (>=3.8.4,<3.9.0)", "psutil", "pycodestyle (>=2.6.0,<2.7.0)", "pyOpenSSL (>=19.0.0,<19.1.0)", "mypy (>=0.800)"]
+
+[[package]]
 name = "wcwidth"
+version = "0.2.5"
+description = "Measures the displayed width of unicode strings in a terminal"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.1.9"
 
 [[package]]
-category = "main"
-description = "An implementation of the WebSocket Protocol (RFC 6455 & 7692)"
 name = "websockets"
+version = "8.0.2"
+description = "An implementation of the WebSocket Protocol (RFC 6455 & 7692)"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "8.0.2"
 
 [[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "3.4.1"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "3.1.0"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["jaraco.itertools", "func-timeout"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
-content-hash = "2e7658770f77cbf0882bc07747dcbc1b9840f268ad4f75422dba969fc2b08d9f"
+lock-version = "1.1"
 python-versions = "^3.6"
+content-hash = "86475a432e03be07aee3a6bdcbb41b8e7b5cb3685215aa8529cae893d5a16255"
 
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 aiofiles = [
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+    {file = "ujson-4.0.2-cp38-cp38-macosx_10_14_x86_64.whl", hash = "sha256:a214ba5a21dad71a43c0f5aef917cd56a2d70bc974d845be211c66b6742a471c"},
+    {file = "ujson-4.0.2-cp38-cp38-manylinux1_i686.whl", hash = "sha256:0190d26c0e990c17ad072ec8593647218fe1c675d11089cd3d1440175b568967"},
+    {file = "ujson-4.0.2-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:f273a875c0b42c2a019c337631bc1907f6fdfbc84210cc0d1fff0e2019bbfaec"},
+    {file = "ujson-4.0.2-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:d3a87888c40b5bfcf69b4030427cd666893e826e82cc8608d1ba8b4b5e04ea99"},
+    {file = "ujson-4.0.2-cp38-cp38-win_amd64.whl", hash = "sha256:7333e8bc45ea28c74ae26157eacaed5e5629dbada32e0103c23eb368f93af108"},
+    {file = "ujson-4.0.2-cp39-cp39-macosx_10_14_x86_64.whl", hash = "sha256:b3a6dcc660220539aa718bcc9dbd6dedf2a01d19c875d1033f028f212e36d6bb"},
+    {file = "ujson-4.0.2-cp39-cp39-manylinux1_i686.whl", hash = "sha256:0ea07fe57f9157118ca689e7f6db72759395b99121c0ff038d2e38649c626fb1"},
+    {file = "ujson-4.0.2-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:4d6d061563470cac889c0a9fd367013a5dbd8efc36ad01ab3e67a57e56cad720"},
+    {file = "ujson-4.0.2-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:b5c70704962cf93ec6ea3271a47d952b75ae1980d6c56b8496cec2a722075939"},
+    {file = "ujson-4.0.2-cp39-cp39-win_amd64.whl", hash = "sha256:aad6d92f4d71e37ea70e966500f1951ecd065edca3a70d3861b37b176dd6702c"},
+    {file = "ujson-4.0.2.tar.gz", hash = "sha256:c615a9e9e378a7383b756b7e7a73c38b22aeb8967a8bfbffd4741f7ffd043c4d"},
+]
+urllib3 = [
+    {file = "urllib3-1.26.6-py2.py3-none-any.whl", hash = "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4"},
+    {file = "urllib3-1.26.6.tar.gz", hash = "sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f"},
 ]
 uvloop = [
     {file = "uvloop-0.14.0-cp35-cp35m-macosx_10_11_x86_64.whl", hash = "sha256:08b109f0213af392150e2fe6f81d33261bb5ce968a288eb698aad4f46eb711bd"},
@@ -843,10 +1134,20 @@ uvloop = [
     {file = "uvloop-0.14.0-cp38-cp38-macosx_10_11_x86_64.whl", hash = "sha256:bcac356d62edd330080aed082e78d4b580ff260a677508718f88016333e2c9c5"},
     {file = "uvloop-0.14.0-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:4315d2ec3ca393dd5bc0b0089d23101276778c304d42faff5dc4579cb6caef09"},
     {file = "uvloop-0.14.0.tar.gz", hash = "sha256:123ac9c0c7dd71464f58f1b4ee0bbd81285d96cdda8bc3519281b8973e3a461e"},
+    {file = "uvloop-0.15.2-cp37-cp37m-macosx_10_14_x86_64.whl", hash = "sha256:19fa1d56c91341318ac5d417e7b61c56e9a41183946cc70c411341173de02c69"},
+    {file = "uvloop-0.15.2-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:e5e5f855c9bf483ee6cd1eb9a179b740de80cb0ae2988e3fa22309b78e2ea0e7"},
+    {file = "uvloop-0.15.2-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:42eda9f525a208fbc4f7cecd00fa15c57cc57646c76632b3ba2fe005004f051d"},
+    {file = "uvloop-0.15.2-cp38-cp38-macosx_10_14_x86_64.whl", hash = "sha256:90e56f17755e41b425ad19a08c41dc358fa7bf1226c0f8e54d4d02d556f7af7c"},
+    {file = "uvloop-0.15.2-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:7ae39b11a5f4cec1432d706c21ecc62f9e04d116883178b09671aa29c46f7a47"},
+    {file = "uvloop-0.15.2-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:b45218c99795803fb8bdbc9435ff7f54e3a591b44cd4c121b02fa83affb61c7c"},
+    {file = "uvloop-0.15.2-cp39-cp39-macosx_10_14_x86_64.whl", hash = "sha256:114543c84e95df1b4ff546e6e3a27521580466a30127f12172a3278172ad68bc"},
+    {file = "uvloop-0.15.2-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:44cac8575bf168601424302045234d74e3561fbdbac39b2b54cc1d1d00b70760"},
+    {file = "uvloop-0.15.2-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:6de130d0cb78985a5d080e323b86c5ecaf3af82f4890492c05981707852f983c"},
+    {file = "uvloop-0.15.2.tar.gz", hash = "sha256:2bb0624a8a70834e54dde8feed62ed63b50bad7a1265c40d6403a2ac447bce01"},
 ]
 wcwidth = [
-    {file = "wcwidth-0.1.9-py2.py3-none-any.whl", hash = "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1"},
-    {file = "wcwidth-0.1.9.tar.gz", hash = "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"},
+    {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},
+    {file = "wcwidth-0.2.5.tar.gz", hash = "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"},
 ]
 websockets = [
     {file = "websockets-8.0.2-cp36-cp36m-macosx_10_6_intel.whl", hash = "sha256:e906128532a14b9d264a43eb48f9b3080d53a9bda819ab45bf56b8039dc606ac"},
@@ -862,6 +1163,6 @@ websockets = [
     {file = "websockets-8.0.2.tar.gz", hash = "sha256:882a7266fa867a2ebb2c0baaa0f9159cabf131cf18c1b4270d79ad42f9208dc5"},
 ]
 zipp = [
-    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
-    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
+    {file = "zipp-3.4.1-py3-none-any.whl", hash = "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"},
+    {file = "zipp-3.4.1.tar.gz", hash = "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index 0a8e67c..07676d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,15 +24,20 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.6"
 gino = { version = "^1.0.0rc2", allow-prereleases = true }
-sanic = "^19.12.2"
+sanic = ">=20.0.0"
+uvloop = [
+    { version = "==0.14", python = "==3.6" },
+    { version = "^0.15", python = ">3.6" }
+]
 
 [tool.poetry.dev-dependencies]
-black = { version = "^19.10b0", python = ">=3.6" }
+black = "^20.8b0"
 
 # tests
 pytest = "^5.3.2"
 pytest-asyncio = "^0.10.0"
 pytest-cov = "^2.8.1"
+pytest-pythonpath = "^0.7.3"
 
 [tool.poetry.plugins."gino.extensions"]
 "sanic" = "gino_sanic"
diff --git a/pytest.ini b/pytest.ini
index 5ee6477..b471005 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,2 +1,3 @@
 [pytest]
 testpaths = tests
+python_paths = src
diff --git a/src/gino_sanic.py b/src/gino_sanic.py
index c80ba9c..2e1a0f2 100644
--- a/src/gino_sanic.py
+++ b/src/gino_sanic.py
@@ -67,7 +67,7 @@ class Gino(_Gino):
     pool on response. If you need to release the connection early in the middle
     to do some long-running tasks, you can simply do this::
 
-        await request['connection'].release(permanent=False)
+        await request.ctx.connection.release(permanent=False)
 
     """
 
@@ -85,17 +85,12 @@ def init_app(self, app):
             @app.middleware("request")
             async def on_request(request):
                 conn = await self.acquire(lazy=True)
-                if hasattr(request, "ctx"):
-                    request.ctx.connection = conn
-                else:
-                    request["connection"] = conn
+                request.ctx.connection = conn
 
             @app.middleware("response")
             async def on_response(request, _):
-                if hasattr(request, "ctx"):
-                    conn = getattr(request.ctx, "connection", None)
-                else:
-                    conn = request.pop("connection", None)
+                conn = getattr(request.ctx, "connection", None)
+
                 if conn is not None:
                     await conn.release()
 
diff --git a/tests/test_gino_sanic.py b/tests/test_gino_sanic.py
index 7f1f80f..89814ea 100644
--- a/tests/test_gino_sanic.py
+++ b/tests/test_gino_sanic.py
@@ -5,9 +5,10 @@
 import gino
 import pytest
 import sanic
-from gino.ext.sanic import Gino
 from sanic.response import text, json
 
+from gino_sanic import Gino
+
 DB_ARGS = dict(
     host=os.getenv("DB_HOST", "localhost"),
     port=os.getenv("DB_PORT", 5432),
@@ -27,7 +28,7 @@ def teardown_module():
 
 # noinspection PyShadowingNames
 async def _app(config):
-    app = sanic.Sanic()
+    app = sanic.Sanic("app")
     app.config.update(config)
     app.config.update(
         {
@@ -47,7 +48,7 @@ class User(db.Model):
 
     @app.route("/")
     async def root(request):
-        conn = await request["connection"].get_raw_connection()
+        conn = await request.ctx.connection.get_raw_connection()
         # noinspection PyProtectedMember
         assert conn._holder._max_inactive_time == _MAX_INACTIVE_CONNECTION_LIFETIME
         return text("Hello, world!")
@@ -59,7 +60,7 @@ async def get_user(request, uid):
         if method == "1":
             return json((await q.gino.first_or_404()).to_dict())
         elif method == "2":
-            return json((await request["connection"].first_or_404(q)).to_dict())
+            return json((await request.ctx.connection.first_or_404(q)).to_dict())
         elif method == "3":
             return json((await db.bind.first_or_404(q)).to_dict())
         elif method == "4":
@@ -73,7 +74,7 @@ async def add_user(request):
         await u.query.gino.first_or_404()
         await db.first_or_404(u.query)
         await db.bind.first_or_404(u.query)
-        await request["connection"].first_or_404(u.query)
+        await request.ctx.connection.first_or_404(u.query)
         return json(u.to_dict())
 
     e = await gino.create_engine(PG_URL)