diff --git a/app/utils/singleton.py b/app/utils/singleton.py
index 057531d6..ece2355c 100644
--- a/app/utils/singleton.py
+++ b/app/utils/singleton.py
@@ -8,14 +8,12 @@ class Singleton(abc.ABCMeta, type):
     """
 
     _instances: dict = {}
-    _lock = threading.Lock()
 
     def __call__(cls, *args, **kwargs):
         key = (cls, args, frozenset(kwargs.items()))
-        with cls._lock:
-            if key not in cls._instances:
-                cls._instances[key] = super().__call__(*args, **kwargs)
-            return cls._instances[key]
+        if key not in cls._instances:
+            cls._instances[key] = super().__call__(*args, **kwargs)
+        return cls._instances[key]
 
 
 class AbstractSingleton(abc.ABC, metaclass=Singleton):