diff --git a/csst_common/logger.py b/csst_common/logger.py
index 8468edd9f3c3ca0b924efb1ef5ccd39f4724215c..72cc1aea0ec93b26247c1775dc48b913015f63c4 100644
--- a/csst_common/logger.py
+++ b/csst_common/logger.py
@@ -42,6 +42,9 @@ def get_logger(name="CSST L1 Pipeline", filename=""):
     """
     # initialize logger
     logger = logging.getLogger(name=name)
+    # empty handlers
+    logger.handlers = []
+    # set level
     logger.setLevel(logging.DEBUG)
 
     # logging formatter