diff --git a/CHANGELOG.md b/CHANGELOG.md
index f3f02e6a..edd1a7dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [0.9.5] 2020
 
 ### Fixes
+- resetting some configuration fields during initialization
 - Arch
     - not checking if **pacman-mirrors** is available before starting to download repository packages (when multi-threaded download is enabled) [#117](https://github.com/vinifmor/bauh/issues/117)
 
diff --git a/bauh/commons/util.py b/bauh/commons/util.py
index 4b873f7e..ec6bb050 100644
--- a/bauh/commons/util.py
+++ b/bauh/commons/util.py
@@ -3,7 +3,7 @@ import collections
 
 def deep_update(source: dict, overrides: dict):
     for key, value in overrides.items():
-        if isinstance(value, collections.Mapping) and value:
+        if isinstance(value, dict):
             returned = deep_update(source.get(key, {}), value)
             source[key] = returned
         else: