diff --git a/src/phi/async_ldap/model.py b/src/phi/async_ldap/model.py
index 6257c55..2558302 100644
--- a/src/phi/async_ldap/model.py
+++ b/src/phi/async_ldap/model.py
@@ -122,6 +122,12 @@ class Hackers(Entry):
     """
 
     kind = "ou"
+    _instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = object.__new__(cls)
+        return cls._instance
 
     def __init__(self, client, *args, **kwargs):
         super().__init__(client)
@@ -142,6 +148,12 @@ class Robots(Entry):
 
     kind = "ou"
     _name = "Services"
+    _instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = object.__new__(cls)
+        return cls._instance
 
     def __init__(self, client, *args, **kwargs):
         super().__init__(client)
@@ -162,6 +174,12 @@ class Congregations(Entry):
 
     kind = "ou"
     _name = "Groups"
+    _instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = object.__new__(cls)
+        return cls._instance
 
     def __init__(self, client, *args, **kwargs):
         super().__init__(client)