diff --git a/backend/Pipfile b/backend/Pipfile
index 32b9b99d..2f2d89bd 100644
--- a/backend/Pipfile
+++ b/backend/Pipfile
@@ -23,3 +23,4 @@ python_version = "3"
 [scripts]
 "server" = "python main.py"
 "test" = "pytest"
+"format" = "black ."
\ No newline at end of file
diff --git a/backend/io_utils.py b/backend/io_utils.py
index d414b739..61d3af02 100644
--- a/backend/io_utils.py
+++ b/backend/io_utils.py
@@ -3,7 +3,7 @@
 import argparse
 
 
-def get_resource_path(relative_path, max_levels=3):
+def get_resource_path(relative_path: str, max_levels: int = 3):
     """Get the absolute path to the resource, works for development and for PyInstaller"""
     # PyInstaller creates a temp folder and stores path in _MEIPASS
     base_path = getattr(sys, "_MEIPASS", os.path.abspath("."))
@@ -19,7 +19,7 @@ def get_resource_path(relative_path, max_levels=3):
     return os.path.join(base_path, relative_path)
 
 
-def parse_cmd_args(default_host, default_port) -> argparse.Namespace:
+def parse_cmd_args(default_host: str, default_port: int) -> argparse.Namespace:
     parser = argparse.ArgumentParser(description="PineSAM - Pinecil v2 Control")
     parser.add_argument(
         "host",
diff --git a/backend/main.py b/backend/main.py
index c5bb46d0..562a1f74 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,6 +1,5 @@
 import asyncio
 import os
-import sys
 from pinecil_monitor import PinecilMonitor, PinecilFinder
 from ws_server import CommandProcessor, WebSocketHandler
 from version_checker import VersionChecker
@@ -8,6 +7,7 @@
 import webbrowser
 from io_utils import parse_cmd_args, get_resource_path
 from rich.logging import RichHandler
+import argparse
 
 LOG_LEVEL = os.environ.get("LOG_LEVEL", "INFO").upper()
 timestamp_format = "%H:%M:%S"
@@ -22,7 +22,7 @@
 DEFAULT_PORT = 8080
 
 
-async def handle_ui_opening(args):
+async def handle_ui_opening(args: argparse.Namespace):
     host = args.host if args.host != "0.0.0.0" else "localhost"
     if not args.no_open:
         await asyncio.sleep(5)
@@ -32,7 +32,7 @@ async def handle_ui_opening(args):
         logging.info(f"Open browser at http://{host}:{args.port}")
 
 
-async def main(stop_event=asyncio.Event()):
+async def main(stop_event: asyncio.Event = asyncio.Event()):
     args = parse_cmd_args(DEFAULT_HOST, DEFAULT_PORT)
     if not args.host or not args.port:
         return
diff --git a/backend/pinecil_monitor.py b/backend/pinecil_monitor.py
index 0e51a2b6..e0dba311 100644
--- a/backend/pinecil_monitor.py
+++ b/backend/pinecil_monitor.py
@@ -33,10 +33,10 @@ def __init__(self, finder: PinecilFinder, broadcast_func: Callable):
         self.should_announce_not_found = True
 
     @property
-    def pinecil(self):
+    def pinecil(self) -> Pinecil | None:
         return self.pinecil_finder.selected
 
-    async def monitor(self, stop_event):
+    async def monitor(self, stop_event: asyncio.Event):
         logging.info("Starting pinecil monitor")
         while not stop_event.is_set():
             if not self.pinecil_finder.pinecils:
diff --git a/ui/src/components/TheWorkView.vue b/ui/src/components/TheWorkView.vue
index ea165c80..a6113356 100644
--- a/ui/src/components/TheWorkView.vue
+++ b/ui/src/components/TheWorkView.vue
@@ -80,6 +80,8 @@ const setExactTemperature = (temp) => {
           @mousedown.left="onChangeTempBtnDown(-1)"
           @touchend="onChangeTempBtnUp"
           @mouseup="onChangeTempBtnUp"
+          @mouseleave="onChangeTempBtnUp"
+          @touchleave="onChangeTempBtnUp"
         >
           <i class="fas fa-minus"></i>
         </button>
@@ -90,6 +92,8 @@ const setExactTemperature = (temp) => {
           @mousedown.left="onChangeTempBtnDown(1)"
           @touchend="onChangeTempBtnUp"
           @mouseup="onChangeTempBtnUp"
+          @touchleave="onChangeTempBtnUp"
+          @mouseleave="onChangeTempBtnUp"
         >
           <i class="fas fa-plus"></i>
         </button>
diff --git a/version.txt b/version.txt
index bda8fbec..a6333e40 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.2.6
+2.2.9