diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 7e9c816..11d1462 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
     - uses: actions/checkout@v5
diff --git a/async_tkinter_loop/async_tkinter_loop.py b/async_tkinter_loop/async_tkinter_loop.py
index 64d6a72..ac628e0 100644
--- a/async_tkinter_loop/async_tkinter_loop.py
+++ b/async_tkinter_loop/async_tkinter_loop.py
@@ -1,9 +1,9 @@
 import _tkinter
 import asyncio
 import tkinter as tk
-from collections.abc import Coroutine
+from collections.abc import Callable, Coroutine
 from functools import wraps
-from typing import Any, Callable
+from typing import Any
 
 from typing_extensions import ParamSpec
 
@@ -31,22 +31,24 @@ async def main_loop(root: tk.Tk) -> None:
 
 def get_event_loop() -> asyncio.AbstractEventLoop:
     """
-    A helper function which returns an event loop using current event loop policy.
+    A helper function which returns a running event loop.
 
     Returns:
         event loop
     """
-    return asyncio.get_event_loop_policy().get_event_loop()
+    return asyncio.get_running_loop()
 
 
-def async_mainloop(root: tk.Tk) -> None:
+def async_mainloop(root: tk.Tk, event_loop: asyncio.AbstractEventLoop | None = None) -> None:
     """
     A function, which is a substitute to the standard `root.mainloop()`.
 
     Args:
         root: tkinter root object
+        event_loop: asyncio event loop (optional)
     """
-    get_event_loop().run_until_complete(main_loop(root))
+    event_loop = event_loop or asyncio.new_event_loop()
+    event_loop.run_until_complete(main_loop(root))
 
 
 P = ParamSpec("P")
@@ -55,6 +57,7 @@ def async_mainloop(root: tk.Tk) -> None:
 def async_handler(
     async_function: Callable[P, Coroutine[Any, Any, None]],
     *args: Any,  # noqa: ANN401
+    event_loop: asyncio.AbstractEventLoop | None = None,
     **kwargs: Any,  # noqa: ANN401
 ) -> Callable[P, None]:
     """
@@ -64,6 +67,7 @@ def async_handler(
     Args:
         async_function: async function
         args: positional parameters which will be passed to the async function
+        event_loop: asyncio event loop (optional, for testing purposes)
         kwargs: keyword parameters which will be passed to the async function
 
     Returns:
@@ -102,9 +106,10 @@ async def some_async_function():
     button = tk.Button("Press me", command=some_async_function)
     ```
     """
+    event_loop = event_loop or get_event_loop()
 
     @wraps(async_function)
     def wrapper(*handler_args) -> None:
-        get_event_loop().create_task(async_function(*handler_args, *args, **kwargs))
+        event_loop.create_task(async_function(*handler_args, *args, **kwargs))
 
     return wrapper
diff --git a/examples/start_stop_counter.py b/examples/start_stop_counter.py
index c8c2ab9..1b888c0 100755
--- a/examples/start_stop_counter.py
+++ b/examples/start_stop_counter.py
@@ -32,8 +32,7 @@ def start_stop():
 event = asyncio.Event()
 
 # Start background task
-loop = asyncio.new_event_loop()
-asyncio.set_event_loop(loop)
-task = loop.create_task(counter())
+event_loop = asyncio.new_event_loop()
+task = event_loop.create_task(counter())
 
-async_mainloop(root)
+async_mainloop(root, event_loop)
diff --git a/poetry.lock b/poetry.lock
index d3be350..a3fc562 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.2.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
 
 [[package]]
 name = "anyio"
@@ -376,7 +376,7 @@ files = [
     {file = "exceptiongroup-1.2.2-py3-none-any.whl", hash = "sha256:3111b9d131c238bec2f8f516e123e14ba243563fb135d3fe885990585aa7795b"},
     {file = "exceptiongroup-1.2.2.tar.gz", hash = "sha256:47c2edf7c6738fafb49fd34290706d1a1a2f4d1c6df275526b62cbb4aa5393cc"},
 ]
-markers = {main = "extra == \"examples\" and python_version < \"3.11\"", dev = "python_version < \"3.11\""}
+markers = {main = "extra == \"examples\" and python_version == \"3.10\"", dev = "python_version == \"3.10\""}
 
 [package.extras]
 test = ["pytest (>=6)"]
@@ -492,31 +492,6 @@ markers = {main = "extra == \"examples\""}
 [package.extras]
 all = ["flake8 (>=7.1.1)", "mypy (>=1.11.2)", "pytest (>=8.3.2)", "ruff (>=0.6.2)"]
 
-[[package]]
-name = "importlib-metadata"
-version = "8.5.0"
-description = "Read metadata from Python packages"
-optional = false
-python-versions = ">=3.8"
-groups = ["docs"]
-markers = "python_version == \"3.9\""
-files = [
-    {file = "importlib_metadata-8.5.0-py3-none-any.whl", hash = "sha256:45e54197d28b7a7f1559e60b95e7c567032b602131fbd588f1497f47880aa68b"},
-    {file = "importlib_metadata-8.5.0.tar.gz", hash = "sha256:71522656f0abace1d072b9e5481a48f07c138e00f079c38c8f883823f9c26bd7"},
-]
-
-[package.dependencies]
-zipp = ">=3.20"
-
-[package.extras]
-check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
-cover = ["pytest-cov"]
-doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
-enabler = ["pytest-enabler (>=2.2)"]
-perf = ["ipython"]
-test = ["flufl.flake8", "importlib-resources (>=1.3) ; python_version < \"3.9\"", "jaraco.test (>=5.4)", "packaging", "pyfakefs", "pytest (>=6,!=8.1.*)", "pytest-perf (>=0.9.2)"]
-type = ["pytest-mypy"]
-
 [[package]]
 name = "iniconfig"
 version = "2.0.0"
@@ -559,9 +534,6 @@ files = [
     {file = "markdown-3.7.tar.gz", hash = "sha256:2ae2471477cfd02dbbf038d5d9bc226d40def84b4fe2986e49b59b6b472bbed2"},
 ]
 
-[package.dependencies]
-importlib-metadata = {version = ">=4.4", markers = "python_version < \"3.10\""}
-
 [package.extras]
 docs = ["mdx-gh-links (>=0.2)", "mkdocs (>=1.5)", "mkdocs-gen-files", "mkdocs-literate-nav", "mkdocs-nature (>=0.6)", "mkdocs-section-index", "mkdocstrings[python]"]
 testing = ["coverage", "pyyaml"]
@@ -665,7 +637,6 @@ files = [
 click = ">=7.0"
 colorama = {version = ">=0.4", markers = "platform_system == \"Windows\""}
 ghp-import = ">=1.0"
-importlib-metadata = {version = ">=4.4", markers = "python_version < \"3.10\""}
 jinja2 = ">=2.11.1"
 markdown = ">=3.3.6"
 markupsafe = ">=2.0.1"
@@ -711,7 +682,6 @@ files = [
 ]
 
 [package.dependencies]
-importlib-metadata = {version = ">=4.3", markers = "python_version < \"3.10\""}
 mergedeep = ">=1.3.4"
 platformdirs = ">=2.2.0"
 pyyaml = ">=5.1"
@@ -771,7 +741,6 @@ files = [
 ]
 
 [package.dependencies]
-importlib-metadata = {version = ">=4.6", markers = "python_version < \"3.10\""}
 Jinja2 = ">=2.11.1"
 Markdown = ">=3.6"
 MarkupSafe = ">=1.1"
@@ -1380,31 +1349,10 @@ files = [
 [package.extras]
 watchmedo = ["PyYAML (>=3.10)"]
 
-[[package]]
-name = "zipp"
-version = "3.21.0"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-optional = false
-python-versions = ">=3.9"
-groups = ["docs"]
-markers = "python_version == \"3.9\""
-files = [
-    {file = "zipp-3.21.0-py3-none-any.whl", hash = "sha256:ac1bbe05fd2991f160ebce24ffbac5f6d11d83dc90891255885223d42b3cd931"},
-    {file = "zipp-3.21.0.tar.gz", hash = "sha256:2c9958f6430a2040341a52eb608ed6dd93ef4392e02ffe219417c1b28b5dd1f4"},
-]
-
-[package.extras]
-check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
-cover = ["pytest-cov"]
-doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
-enabler = ["pytest-enabler (>=2.2)"]
-test = ["big-O", "importlib-resources ; python_version < \"3.9\"", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more-itertools", "pytest (>=6,!=8.1.*)", "pytest-ignore-flaky"]
-type = ["pytest-mypy"]
-
 [extras]
 examples = ["Pillow", "customtkinter", "httpx"]
 
 [metadata]
 lock-version = "2.1"
-python-versions = "^3.9"
-content-hash = "f7ee63e7b6a43abd3ae51983a95579f0738d3721811ca34f3105f4a768e412ad"
+python-versions = "^3.10"
+content-hash = "0823bfbc1ae0a4332318f742467dcd8a208f4bfdf955a916694634f0b8f4a189"
diff --git a/pyproject.toml b/pyproject.toml
index 2141c77..94c4c0e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = "^3.10"
 Pillow = {version = ">=10.3.0,<12.0.0", optional = true}
 httpx = {version = ">=0.23.1,<0.29.0", optional = true}
 customtkinter = {version = "^5.2.1", optional = true}
@@ -44,7 +44,7 @@ requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.ruff]
-target-version = "py39"
+target-version = "py310"
 line-length = 120
 
 [tool.ruff.lint]
diff --git a/tests/test_async_tk_loop.py b/tests/test_async_tk_loop.py
index 16f3022..975291b 100644
--- a/tests/test_async_tk_loop.py
+++ b/tests/test_async_tk_loop.py
@@ -9,13 +9,6 @@
 TIMEOUT = 60
 
 
-@pytest.mark.timeout(TIMEOUT)
-def test_destroy():
-    root = Tk()
-    root.destroy()
-    async_mainloop(root)
-
-
 @pytest.mark.timeout(TIMEOUT)
 def test_async_command():
     root = Tk()
@@ -25,9 +18,10 @@ async def button_pressed():
         await asyncio.sleep(0.1)
         root.destroy()
 
-    async_handler(button_pressed)()
+    event_loop = asyncio.new_event_loop()
+    async_handler(button_pressed, event_loop=event_loop)()
 
-    async_mainloop(root)
+    async_mainloop(root, event_loop)
 
 
 @pytest.mark.timeout(TIMEOUT)
@@ -38,9 +32,10 @@ async def on_click(_event):
         await asyncio.sleep(0.1)
         root.destroy()
 
-    async_handler(on_click)(Mock("Event"))
+    event_loop = asyncio.new_event_loop()
+    async_handler(on_click, event_loop=event_loop)(Mock("Event"))
 
-    async_mainloop(root)
+    async_mainloop(root, event_loop)
 
 
 @pytest.mark.timeout(TIMEOUT)
@@ -48,25 +43,31 @@ def test_async_command_as_decorator():
     root = Tk()
 
     # Simulate a click on a button which closes the window with some delay
-    @async_handler
+    # @async_handler
     async def button_pressed():
         await asyncio.sleep(0.1)
         root.destroy()
 
+    event_loop = asyncio.new_event_loop()
+    button_pressed = async_handler(button_pressed, event_loop=event_loop)
     button_pressed()
 
-    async_mainloop(root)
+    async_mainloop(root, event_loop)
 
 
 @pytest.mark.timeout(TIMEOUT)
 def test_async_event_handler_as_decorator():
     root = Tk()
 
-    @async_handler
+    event_loop = asyncio.new_event_loop()
+
+    # @async_handler
     async def on_click(_event):
         await asyncio.sleep(0.1)
         root.destroy()
 
+    event_loop = asyncio.new_event_loop()
+    on_click = async_handler(on_click, event_loop=event_loop)
     on_click(Mock("Event"))
 
-    async_mainloop(root)
+    async_mainloop(root, event_loop)