diff --git a/capa/features/common.py b/capa/features/common.py
index 6b867766..f9a9a927 100644
--- a/capa/features/common.py
+++ b/capa/features/common.py
@@ -178,7 +178,6 @@ class MatchedRule(Feature):
 
 class Characteristic(Feature):
     def __init__(self, value: str, description=None):
-
         super(Characteristic, self).__init__(value, description=description)