diff --git a/aggregator.py b/aggregator.py
index 549a0d5..92b5746 100644
--- a/aggregator.py
+++ b/aggregator.py
@@ -47,7 +47,7 @@ class Aggregator:
                 _map_aux, func, self.path, self.path_out, self.pp_params, **kwargs
             )
 
-            pool = MyPool(processes=num_process)
+            pool = MyPool(processes=num_process, maxtasksperchild=1)
             result = pool.map(map_fn, run_num)
             pool.close()
             pool.join()