diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index 3985d41..e65349f 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -20,7 +20,7 @@ jobs:
     # The type of runner that the job will run on
     strategy:
       matrix:
-        python-versions: [3.7, 3.8, 3.9]
+        python-versions: [3.9]
         os: [ubuntu-18.04, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
 
diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 953a60e..8f63a20 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        python-versions: [ 3.8 ]
+        python-versions: [ 3.9 ]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6060909..7f80884 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ jobs:
 
     strategy:
       matrix:
-        python-versions: [3.8]
+        python-versions: [3.9]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 91c76e6..f38ed79 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -21,7 +21,7 @@ repos:
     rev: 21.5b1
     hooks:
       - id: black
-        language_version: python3.8
+        language_version: python3.9
   - repo: https://github.com/pycqa/flake8
     rev: 3.9.2
     hooks:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2efe9c2..250352c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -95,7 +95,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.md.
-3. The pull request should work for Python 3.7, 3.8 and 3.9. Check
+3. The pull request should work for Python 3.9. Check
    https://github.com/ep1cman/unifi-protect-backup/actions
    and make sure that the tests pass for all supported Python versions.
 
diff --git a/poetry.lock b/poetry.lock
index 31c6f3d..d1edf02 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -9,12 +9,10 @@ python-versions = ">=3.6"
 [package.dependencies]
 aiosignal = ">=1.1.2"
 async-timeout = ">=4.0.0a3,<5.0"
-asynctest = {version = "0.13.0", markers = "python_version < \"3.8\""}
 attrs = ">=17.3.0"
 charset-normalizer = ">=2.0,<3.0"
 frozenlist = ">=1.1.1"
 multidict = ">=4.5,<7.0"
-typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 yarl = ">=1.0,<2.0"
 
 [package.extras]
diff --git a/pyproject.toml b/pyproject.toml
index 502e275..1a7a35c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,8 +13,6 @@ classifiers=[
     'License :: OSI Approved :: MIT License',
     'Natural Language :: English',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.7',
-    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
 ]
 packages = [
@@ -23,7 +21,7 @@ packages = [
 ]
 
 [tool.poetry.dependencies]
-python = ">=3.7.0,<4.0"
+python = ">=3.9.0,<4.0"
 click = "8.0.1"
 
 black  = { version = "^21.5b2", optional = true}
@@ -77,7 +75,7 @@ unifi-protect-backup = 'unifi_protect_backup.cli:main'
 [tool.black]
 line-length = 120
 skip-string-normalization = true
-target-version = ['py37', 'py38']
+target-version = ['py39']
 include = '\.pyi?$'
 exclude = '''
 /(
diff --git a/setup.cfg b/setup.cfg
index 39b55a0..8e96de9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -40,13 +40,11 @@ exclude_lines =
 
 [tox:tox]
 isolated_build = true
-envlist = py37, py38, py39, format, lint, build
+envlist = py39, format, lint, build
 
 [gh-actions]
 python =
-    3.9: py39
-    3.8: py38, format, lint, build
-    3.7: py37
+    3.9: py39, format, lint, build
 
 [testenv]
 allowlist_externals = pytest