diff --git a/tractor/_state.py b/tractor/_state.py
index 03ddf13..37e6a1f 100644
--- a/tractor/_state.py
+++ b/tractor/_state.py
@@ -2,7 +2,7 @@
 Per process state
 """
 from typing import Optional, Dict, Any
-from collections import Mapping
+from collections.abc import Mapping
 import multiprocessing as mp
 
 import trio