diff --git a/scripts/_helpers.py b/scripts/_helpers.py
index dc638915..435beee4 100644
--- a/scripts/_helpers.py
+++ b/scripts/_helpers.py
@@ -29,7 +29,7 @@ def configure_logging(snakemake, skip_handlers=False):
 
     import logging
 
-    kwargs = snakemake.config.get('logging', dict())
+    kwargs = snakemake.config.get('logging', dict()).copy()
     kwargs.setdefault("level", "INFO")
 
     if skip_handlers is False: