diff --git a/TermTk/TTkCore/signal.py b/TermTk/TTkCore/signal.py
index bff42780..3f6325d6 100644
--- a/TermTk/TTkCore/signal.py
+++ b/TermTk/TTkCore/signal.py
@@ -60,9 +60,26 @@ __all__ = ['pyTTkSlot', 'pyTTkSignal']
 # from typing import TypeVar, TypeVarTuple, Generic, List
 from inspect import getfullargspec, iscoroutinefunction
 from types import LambdaType
-from threading import Lock, Thread
+from threading import Lock
 import asyncio
 
+import importlib.util
+
+if importlib.util.find_spec('pyodideProxy'):
+    pass
+else:
+    from threading import Thread
+    import asyncio
+
+    def _async_runner(coros):
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        loop.run_until_complete(asyncio.gather(*coros))
+        loop.close()
+
+    def _run_coroutines(coros):
+        Thread(target=_async_runner, args=(coros,)).start()
+
 def pyTTkSlot(*args):
     def pyTTkSlot_d(func):
         # Add signature attributes to the function
@@ -136,12 +153,6 @@ class pyTTkSignal():
             if slot in self._connected_slots:
                 del self._connected_slots[slot]
 
-    def _async_runner(self, coros):
-        loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(loop)
-        loop.run_until_complete(asyncio.gather(*coros))
-        loop.close()
-
     def emit(self, *args, **kwargs) -> None:
         if not self._mutex.acquire(False): return
         if len(args) != len(self._types):
@@ -151,7 +162,7 @@ class pyTTkSignal():
             slot(*args[sl], **kwargs)
         if self._connected_async_slots:
             coros = [slot(*args[sl], **kwargs) for slot,sl in self._connected_async_slots.copy().items()]
-            Thread(target=self._async_runner, args=(coros,)).start()
+            _run_coroutines(coros)
         self._mutex.release()
 
     def clear(self):
@@ -165,4 +176,4 @@ class pyTTkSignal():
     def forward(self):
         def _ret(*args, **kwargs) -> None:
             self.emit(*args, **kwargs)
-        return _ret
+        return _ret
\ No newline at end of file
diff --git a/tests/t.ui/test.ui.034.async.01.py b/tests/t.ui/test.ui.034.async.01.py
new file mode 100755
index 00000000..d326ae88
--- /dev/null
+++ b/tests/t.ui/test.ui.034.async.01.py
@@ -0,0 +1,49 @@
+import asyncio
+import inspect
+import sys, os
+import time
+
+sys.path.append(os.path.join(sys.path[0],'..'))
+import TermTk as ttk
+
+root = ttk.TTk(layout=ttk.TTkVBoxLayout())
+res = ttk.TTkLabel(parent=root)
+num = ttk.TTkLabel(parent=root, text=1)
+button_add = ttk.TTkButton(parent=root, text="+")
+button_add.clicked.connect(lambda: num.setText(int(num.text()) + 1))
+button_call = ttk.TTkButton(parent=root, text="Call")
+ttk.TTkButton(parent=root, text="Quit").clicked.connect(ttk.TTkHelper.quit)
+
+@ttk.pyTTkSlot()
+def call0():
+    res.setText("0 Calling...")
+    time.sleep(1)
+    res.setText("0 Calling... - DONE")
+
+async def call1():
+    res.setText("1 Calling...")
+    await asyncio.sleep(3)
+    res.setText("1 Calling... - DONE")
+
+@ttk.pyTTkSlot()
+async def call2():
+    res.setText("2 Calling...")
+    await asyncio.sleep(5)
+    res.setText("2 Calling... - DONE")
+
+@ttk.pyTTkSlot(int)
+async def call3(val):
+    res.setText(f"3 Calling... {val}")
+    await asyncio.sleep(5)
+    res.setText(f"3 Calling... {val} - DONE")
+
+print(inspect.iscoroutinefunction(call0))
+print(inspect.iscoroutinefunction(call1))
+print(inspect.iscoroutinefunction(call2))
+print(inspect.iscoroutinefunction(call3))
+
+button_call.clicked.connect(call0)
+button_call.clicked.connect(call1)
+button_call.clicked.connect(call2)
+
+root.mainloop()
\ No newline at end of file