diff --git a/schainpy/controller.py b/schainpy/controller.py
index 1036ca6..8dfca2f 100644
--- a/schainpy/controller.py
+++ b/schainpy/controller.py
@@ -66,8 +66,10 @@ class ConfBase():
 
     def update(self, **kwargs):
 
-        for key, value in kwargs.items():
-            self.addParameter(name=key, value=value)
+        if 'format' not in kwargs:
+            kwargs['format'] = None
+        for key, value, fmt in kwargs.items():
+            self.addParameter(name=key, value=value, format=fmt)
 
     def addParameter(self, name, value, format=None):
         '''