diff --git a/UPGRADE-v2.0.md b/UPGRADE-v2.0.md
index c3238254..0f7e8209 100644
--- a/UPGRADE-v2.0.md
+++ b/UPGRADE-v2.0.md
@@ -45,7 +45,7 @@ With 2.0:
 ```python
 my_field = graphene.String(my_arg=graphene.String())
 
-def resolve_my_field(self, arg1, arg2):
+def resolve_my_field(self, my_arg):
     return ...
 ```