diff --git a/qlib/data/filter.py b/qlib/data/filter.py
index 70f9d3278..784fad8d7 100644
--- a/qlib/data/filter.py
+++ b/qlib/data/filter.py
@@ -354,7 +354,8 @@ class ExpressionDFilter(SeriesDFilter):
         rule_expression_field_name = list(_features.keys())[0]
         all_filter_series = _features[rule_expression_field_name]
         return all_filter_series
-
+    
+    @staticmethod
     def from_config(config):
         return ExpressionDFilter(
             rule_expression=config["rule_expression"],