diff --git a/odc/stats/proc.py b/odc/stats/proc.py
index 4749846..deceb18 100644
--- a/odc/stats/proc.py
+++ b/odc/stats/proc.py
@@ -327,6 +327,10 @@ def run(
             )
         raise ValueError("Must supply one of tasks= or sqs=")
 
+    def __del__(self):
+        if self.client():
+            self.client().close()
+
 
 def get_max_mem() -> int:
     """