diff --git a/bfxapi/_version.py b/bfxapi/_version.py
index 6ab976e..e5b84fb 100644
--- a/bfxapi/_version.py
+++ b/bfxapi/_version.py
@@ -1 +1 @@
-__version__ = "3.0.0b3"
+__version__ = "3.0.0b4"
diff --git a/bfxapi/websocket/_client/bfx_websocket_bucket.py b/bfxapi/websocket/_client/bfx_websocket_bucket.py
index 8d83385..e30ec18 100644
--- a/bfxapi/websocket/_client/bfx_websocket_bucket.py
+++ b/bfxapi/websocket/_client/bfx_websocket_bucket.py
@@ -130,7 +130,7 @@ class BfxWebSocketBucket(Connection):
 
     @Connection._require_websocket_connection
     async def resubscribe(self, sub_id: str) -> None:
-        for subscription in self.__subscriptions.values():
+        for subscription in list(self.__subscriptions.values()):
             if subscription["sub_id"] == sub_id:
                 await self.unsubscribe(sub_id)