diff --git a/symmer/process_handler.py b/symmer/process_handler.py
index 6ec4ad0c..4f15a363 100644
--- a/symmer/process_handler.py
+++ b/symmer/process_handler.py
@@ -12,7 +12,7 @@
 
 class ProcessHandler:
 
-    method  = 'mp'
+    method  = 'ray'
     verbose = False
 
     def __init__(self):