diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d238a558..030da513 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,7 +20,7 @@ on:
       - "pyproject.toml"
 
 jobs:
-  build:
+  tests:
     strategy:
       fail-fast: false
       matrix:
@@ -33,8 +33,7 @@ jobs:
           - '3.9'
           - '3.10'
           - '3.11'
-          - 'pypy3.8'
-          - 'pypy3.9'
+          - '3.12'
 
     defaults:
       # Windows sucks. Force use bash instead of PowerShell
@@ -44,21 +43,13 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     env:
-      # We disable some features for PyPy by this environment variable such as:
-      # – Installation of `fast` extras: `uvloop` on PyPy is useless and may be even slower
-      # than the default loop;
-      # – Coverage reports: code introspection disables any optimizations, so tests with
-      # coverage enabled are very slow on PyPy.
-      # More: https://www.pypy.org/performance.html
-      IS_PYPY: ${{ startswith(matrix.python-version, 'pypy') }}
-      # Windows has also some limitations:
+      # Windows has some limitations:
       # – Redis is not supported on GitHub Windows runners;
-      # – Poetry installer doesn't work on Windows with PyPy.
       IS_WINDOWS: ${{ startswith(matrix.os, 'windows') }}
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
         uses: actions/setup-python@v4
@@ -72,7 +63,6 @@ jobs:
           pip install -e .[dev,test,redis,proxy,i18n,fast]
 
       - name: Lint code
-        if: "env.IS_PYPY == 'false'"
         run: |
           ruff --output-format=github aiogram examples
           mypy aiogram
@@ -86,13 +76,11 @@ jobs:
 
       - name: Run tests
         run: |
-          flags=""
-          [[ "$IS_PYPY" == "false" ]] && flags="$flags --cov=aiogram --cov-config .coveragerc --cov-report=xml"
+          flags="$flags --cov=aiogram --cov-config .coveragerc --cov-report=xml"
           [[ "$IS_WINDOWS" == "false" ]] && flags="$flags --redis redis://localhost:6379/0"
           pytest $flags
 
       - name: Upload coverage data
-        if: "env.IS_PYPY == 'false'"
         uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
@@ -100,3 +88,47 @@ jobs:
           flags: unittests
           name: py-${{ matrix.python-version }}-${{ matrix.os }}
           fail_ci_if_error: true
+
+  pypy-tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          # - windows-latest
+        python-version:
+          - 'pypy3.8'
+          - 'pypy3.9'
+
+    defaults:
+      # Windows sucks. Force use bash instead of PowerShell
+      run:
+        shell: bash
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "pip"
+          cache-dependency-path: pyproject.toml
+
+      - name: Install project dependencies
+        run: |
+          pip install -e .[dev,test,redis,proxy,i18n,fast]
+
+      - name: Setup redis
+        uses: shogo82148/actions-setup-redis@v1
+        with:
+          redis-version: 6
+
+      - name: Run tests
+        run: |
+          flags=""
+          pytest $flags
diff --git a/CHANGES/1354.misc.rst b/CHANGES/1354.misc.rst
new file mode 100644
index 00000000..42b4cfa5
--- /dev/null
+++ b/CHANGES/1354.misc.rst
@@ -0,0 +1 @@
+Introduce Python 3.12 support
diff --git a/aiogram/__init__.py b/aiogram/__init__.py
index 31d1b16b..b945226f 100644
--- a/aiogram/__init__.py
+++ b/aiogram/__init__.py
@@ -15,8 +15,10 @@ from .utils.text_decorations import markdown_decoration as md
 
 with suppress(ImportError):
     import uvloop as _uvloop
+    import asyncio
+
+    asyncio.set_event_loop_policy(_uvloop.EventLoopPolicy())
 
-    _uvloop.install()  # type: ignore[attr-defined,unused-ignore]
 
 F = MagicFilter()
 flags = FlagGenerator()
diff --git a/pyproject.toml b/pyproject.toml
index 0557223b..2d17be3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
     "Topic :: Software Development :: Libraries :: Python Modules",
@@ -41,7 +42,7 @@ classifiers = [
 ]
 dependencies = [
     "magic-filter>=1.0.12,<1.1",
-    "aiohttp~=3.8.5",
+    "aiohttp~=3.9.0",
     "pydantic>=2.4.1,<2.6",
     "aiofiles~=23.2.1",
     "certifi>=2023.7.22",
@@ -144,7 +145,7 @@ features = [
 serve = "sphinx-autobuild --watch aiogram/ --watch CHANGELOG.rst --watch README.rst docs/ docs/_build/ {args}"
 
 [tool.hatch.envs.dev]
-python = "3.11"
+python = "3.12"
 features = [
     "dev",
     "fast",
@@ -185,7 +186,7 @@ view-cov = "google-chrome-stable reports/py{matrix:python}/coverage/index.html"
 
 
 [[tool.hatch.envs.test.matrix]]
-python = ["38", "39", "310", "311"]
+python = ["38", "39", "310", "311", "312"]
 
 [tool.ruff]
 line-length = 99
diff --git a/tests/test_fsm/storage/test_isolation.py b/tests/test_fsm/storage/test_isolation.py
index 8be303c4..1fb21d55 100644
--- a/tests/test_fsm/storage/test_isolation.py
+++ b/tests/test_fsm/storage/test_isolation.py
@@ -53,7 +53,7 @@ class TestRedisEventIsolation:
             assert isolation.redis is not None
             assert isolation.key_builder is not None
 
-            assert pool.called_once_with("redis://localhost:6379/0")
+            pool.assert_called_once_with("redis://localhost:6379/0")
 
     async def test_close(self):
         isolation = RedisEventIsolation(redis=AsyncMock())
diff --git a/tests/test_fsm/test_state.py b/tests/test_fsm/test_state.py
index 159b20ca..dd240946 100644
--- a/tests/test_fsm/test_state.py
+++ b/tests/test_fsm/test_state.py
@@ -1,7 +1,10 @@
 import pytest
+import sys
 
 from aiogram.fsm.state import State, StatesGroup, any_state
 
+PY312_OR_GREATER = sys.version_info >= (3, 12)
+
 
 class TestState:
     def test_empty(self):
@@ -72,10 +75,20 @@ class TestState:
         assert state(None, check) is result
 
     def test_state_in_unknown_class(self):
-        with pytest.raises(RuntimeError):
+        if PY312_OR_GREATER:
+            # Python 3.12+ does not wrap __set_name__ exceptions with RuntimeError anymore as part
+            # of PEP 678. See "Other Language Changes" in the changelogs:
+            # https://docs.python.org/3/whatsnew/3.12.html
+            with pytest.raises(ValueError):
 
-            class MyClass:
-                state1 = State()
+                class MyClass:
+                    state1 = State()
+
+        else:
+            with pytest.raises(RuntimeError):
+
+                class MyClass:
+                    state1 = State()
 
 
 class TestStatesGroup:
diff --git a/tests/test_webhook/test_aiohtt_server.py b/tests/test_webhook/test_aiohtt_server.py
index 4e3f6658..f29895ba 100644
--- a/tests/test_webhook/test_aiohtt_server.py
+++ b/tests/test_webhook/test_aiohtt_server.py
@@ -181,10 +181,20 @@ class TestSimpleRequestHandler:
             "aiogram.dispatcher.dispatcher.Dispatcher.silent_call_request",
             new_callable=AsyncMock,
         ) as mocked_silent_call_request:
+            method_called_event = asyncio.Event()
+            mocked_silent_call_request.side_effect = (
+                lambda *args, **kwargs: method_called_event.set()
+            )
+
             handler_event.clear()
             resp = await self.make_reqest(client=client)
             assert resp.status == 200
             await asyncio.wait_for(handler_event.wait(), timeout=1)
+            await asyncio.wait_for(method_called_event.wait(), timeout=1)
+            # Python 3.12 had some changes to asyncio which make it quite a bit faster. But
+            # probably because of that the assert_awaited call is consistently scheduled before the
+            # silent_call_request call - failing the test. So we wait for the method to be called
+            # before asserting if it has been awaited.
             mocked_silent_call_request.assert_awaited()
         result = await resp.json()
         assert not result