diff --git a/src/sora_sdk/__init__.py b/src/sora_sdk/__init__.py
index 8c3f8e4..e4c77f0 100644
--- a/src/sora_sdk/__init__.py
+++ b/src/sora_sdk/__init__.py
@@ -55,14 +55,18 @@ def on_data(self, *args, **kwargs):
 
 
 class SoraVideoSource():
+    _instances = []
+
     def __init__(self, sora, source):
+        SoraVideoSource._instances.append(self)
         self._sora = sora
         self.source = source
-    
+
     def __del__(self):
         print("__del__ SoraVideoSource 1")
         self.source = None
         self._sora = None
+        SoraVideoSource._instances.remove(self)
         print("__del__ SoraVideoSource 2")
 
     def on_captured(self, *args, **kwargs):
@@ -186,8 +190,9 @@ def __init__(self, *args, **kwargs):
         Sora._instances.append(self)
 
     def __del__(self):
+        print("__del__ Sora 1")
         Sora._instances.remove(self)
-        print("__del__ Sora")
+        print("__del__ Sora 2")
 
     def create_connection(
         self,