diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 6a366c4..5409332 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -53,6 +53,9 @@ jobs:
     - name: Install dependencies
       run: poetry install --without docs
 
+    - name: Check formatting with ruff
+      run: poetry run ruff format . --check
+
     - name: Lint with ruff
       run: poetry run ruff check . --statistics
 
diff --git a/async_tkinter_loop/async_tkinter_loop.py b/async_tkinter_loop/async_tkinter_loop.py
index 9547629..20a61a9 100644
--- a/async_tkinter_loop/async_tkinter_loop.py
+++ b/async_tkinter_loop/async_tkinter_loop.py
@@ -108,6 +108,7 @@ async def some_async_function():
     button = tk.Button("Press me", command=some_async_function)
     ```
     """
+
     @wraps(async_function)
     def wrapper(*handler_args) -> None:
         loop = event_loop or get_event_loop()
diff --git a/docs/similar_projects.md b/docs/similar_projects.md
index b6b71b5..a46f60f 100644
--- a/docs/similar_projects.md
+++ b/docs/similar_projects.md
@@ -3,9 +3,10 @@
 * [Starwort/asynctk](https://github.com/Starwort/asynctk) ([on PyPi](https://pypi.org/project/asynctk/)) - tries to wrap all widgets and make all their methods asyncroneous.  
    Most recent commit: October 2021.  
    GPL v3 license.
-* [gottadiveintopython/asynctkinter](https://github.com/gottadiveintopython/asynctkinter) ([on PyPi](https://pypi.org/project/asynctkinter/)) - looks like an asynchronous framework itself (like [trio](https://github.com/python-trio/trio)).  
-   Most recent commit: August 2023.  
+* [asyncgui/asynctkinter](https://github.com/asyncgui/asynctkinter) ([on PyPi](https://pypi.org/project/asynctkinter/)) - looks like an asynchronous framework itself (like [trio](https://github.com/python-trio/trio)).  
+   Archived Jun 15, 2026
    MIT License.
+* [asyncgui/asynctkinter2](https://github.com/asyncgui/asynctkinter2) ([on PyPi](https://pypi.org/project/asynctkinter2/)) - successor of asynctkinter.
 
 The latter two projects use old `asyncio` code (from before `async`/`await` syntax addition):
 
diff --git a/poetry.lock b/poetry.lock
index d58fe34..ea9b6ef 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1343,4 +1343,4 @@ examples = ["Pillow", "customtkinter", "httpx"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.10"
-content-hash = "a536467d2615bf58cae786ff106409312e1c093a060fec580df5ac874177708d"
+content-hash = "40d20c89312b9b1b261976a6d06b6c4627bc53168ffbd03030c6de48f15531ed"
diff --git a/poetry.toml b/poetry.toml
deleted file mode 100644
index ab1033b..0000000
--- a/poetry.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-[virtualenvs]
-in-project = true
diff --git a/pyproject.toml b/pyproject.toml
index fddb225..6e9d666 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "async-tkinter-loop"
-version = "0.10.3"
+version = "0.10.4"
 description = "Asynchronous mainloop implementation for tkinter"
 authors = ["insolor <insolor@gmail.com>"]
 license = "MIT"
@@ -21,7 +21,7 @@ classifiers = [
 python = "^3.10"
 Pillow = {version = ">=10.3.0,<13.0.0", optional = true}
 httpx = {version = ">=0.23.1,<0.29.0", optional = true}
-customtkinter = {version = "^5.2.1", optional = true}
+customtkinter = {version = ">=5,<6", optional = true}
 typing-extensions = "*"
 
 [tool.poetry.group.dev.dependencies]
@@ -53,6 +53,7 @@ ignore = [
     "D",  # Warning about docstrings are suppressed for now
     "ANN002",
     "ANN003",
+    "COM812",  # Conflicts with the formatter
 ]
 fixable = ["ALL"]