diff --git a/src/wrpc/helpers.py b/src/wrpc/helpers.py
index 4c20f39..36b41b7 100644
--- a/src/wrpc/helpers.py
+++ b/src/wrpc/helpers.py
@@ -13,7 +13,7 @@ from .rpc import Rpc
 class RpcEndpoint:
     def __init__(self, rpc, endpoints, get_endpoints, target):
         self.__rpc = rpc
-        self.__endpoints = endpoints
+        self.__endpoints = list(endpoints)
         self.__get_endpoints = get_endpoints
         self.__target = target
 
@@ -24,7 +24,7 @@ class RpcEndpoint:
         return functools.partial(getattr(self.__rpc, name), target=random.choice(self.__endpoints))
 
     def set_endpoints(self, endpoints):
-        self.__endpoints = endpoints
+        self.__endpoints = list(endpoints)
 
 
 class AsyncHelper: