diff --git a/charts/bytewax/examples/wikistream.py b/charts/bytewax/examples/wikistream.py
index 3b825ea..00d6ee4 100644
--- a/charts/bytewax/examples/wikistream.py
+++ b/charts/bytewax/examples/wikistream.py
@@ -3,14 +3,14 @@
 from typing import List, Optional, Tuple
 
 import bytewax.operators as op
-import bytewax.operators.window as win
+import bytewax.operators.windowing as win
 
 # pip install aiohttp-sse-client
 from aiohttp_sse_client.client import EventSource
 from bytewax.connectors.stdio import StdOutSink
 from bytewax.dataflow import Dataflow
 from bytewax.inputs import FixedPartitionedSource, StatefulSourcePartition, batch_async
-from bytewax.operators.window import SystemClockConfig, TumblingWindow, WindowMetadata
+from bytewax.operators.windowing import SystemClock, TumblingWindower
 
 
 async def _sse_agen(url):
@@ -53,19 +53,19 @@ def get_server_name(data_dict):
 server_counts = win.count_window(
     "count",
     inp,
-    SystemClockConfig(),
-    TumblingWindow(
+    SystemClock(),
+    TumblingWindower(
         length=timedelta(seconds=2), align_to=datetime(2023, 1, 1, tzinfo=timezone.utc)
     ),
     get_server_name,
 )
-# ("server.name", count_per_window)
+# ("server.name", (window_id, count_per_window))
 
 
 def keep_max(
-    max_count: Optional[int], new_window_count: Tuple[WindowMetadata, int]
+    max_count: Optional[int], id_count: Tuple[int, int]
 ) -> Tuple[Optional[int], int]:
-    _metadata, new_count = new_window_count
+    _win_id, new_count = id_count
     if max_count is None:
         new_max = new_count
     else:
@@ -74,7 +74,7 @@ def keep_max(
     return (new_max, new_max)
 
 
-max_count_per_window = op.stateful_map("keep_max", server_counts, keep_max)
+max_count_per_window = op.stateful_map("keep_max", server_counts.down, keep_max)
 # ("server.name", max_per_window)
 
 
@@ -84,4 +84,4 @@ def format_nice(name_max):
 
 
 out = op.map("format", max_count_per_window, format_nice)
-op.output("out", out, StdOutSink())
+op.output("out", out, StdOutSink())
\ No newline at end of file