diff --git a/.github/dependbot.yml b/.github/dependbot.yml
new file mode 100644
index 0000000..b9038ca
--- /dev/null
+++ b/.github/dependbot.yml
@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: monthly
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index a41fd2b..170e955 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -12,8 +12,8 @@ jobs:
     runs-on: "ubuntu-latest"
 
     steps:
-      - uses: "actions/checkout@v2"
-      - uses: "actions/setup-python@v1"
+      - uses: "actions/checkout@v3"
+      - uses: "actions/setup-python@v4"
         with:
           python-version: 3.7
       - name: "Install dependencies"
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 0690b4d..bc271a6 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -39,8 +39,8 @@ jobs:
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
 
     steps:
-      - uses: "actions/checkout@v2"
-      - uses: "actions/setup-python@v1"
+      - uses: "actions/checkout@v3"
+      - uses: "actions/setup-python@v4"
         with:
           python-version: "${{ matrix.python-version }}"
       - name: "Install dependencies"
diff --git a/databases/backends/aiopg.py b/databases/backends/aiopg.py
index 9ad12f6..60c741a 100644
--- a/databases/backends/aiopg.py
+++ b/databases/backends/aiopg.py
@@ -31,7 +31,7 @@ def __init__(
         self._database_url = DatabaseURL(database_url)
         self._options = options
         self._dialect = self._get_dialect()
-        self._pool = None
+        self._pool: typing.Union[aiopg.Pool, None] = None
 
     def _get_dialect(self) -> Dialect:
         dialect = PGDialect_psycopg2(
diff --git a/requirements.txt b/requirements.txt
index 0d1d5b7..3d98858 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,32 +1,31 @@
 -e .
 
 # Async database drivers
-asyncmy
-aiomysql
-aiopg
-aiosqlite
-asyncpg
+asyncmy==0.2.5
+aiomysql==0.1.1
+aiopg==1.3.4
+aiosqlite==0.17.0
+asyncpg==0.26.0
 
 # Sync database drivers for standard tooling around setup/teardown/migrations.
-psycopg2-binary
-pymysql
+psycopg2-binary==2.9.3
+pymysql==1.0.2
 
 # Testing
-autoflake
-black
-codecov
-isort
-mypy
-pytest
-pytest-cov
-starlette
-requests
+autoflake==1.4
+black==22.6.0
+isort==5.10.1
+mypy==0.971
+pytest==7.1.2
+pytest-cov==3.0.0
+starlette==0.20.4
+requests==2.28.1
 
 # Documentation
-mkdocs
-mkdocs-material
-mkautodoc
+mkdocs==1.3.1
+mkdocs-material==8.3.9
+mkautodoc==0.1.0
 
 # Packaging
-twine
-wheel
+twine==4.0.1
+wheel==0.37.1