diff --git a/setup.cfg b/setup.cfg
index 622c74f59..7d3b74634 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,4 +8,4 @@ warningfilters=module   |.*            |DeprecationWarning |notebook.*
                ignore   |.*schema.*    |UserWarning        |nbfor.*
                ignore   |The 'warn' method is deprecated, use 'warning' instead     | DeprecationWarning |notebook.*
                error    |encodestring\(\) is a deprecated alias, use encodebytes\(\)| DeprecationWarning | notebook.*
-
+               error    |decodestring\(\) is a .*| DeprecationWarning | notebook.*