diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index ec53a47..4bcb8fc 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -194,7 +194,7 @@
           '': {
               'handlers': ['default'],
               'propagate': True,
-              'level': 'INFO',
+              'level': 'WARNING',
           }
       }
   }