diff --git a/schema/input.graphql b/schema/input.graphql
index 213da17b..027cfe57 100644
--- a/schema/input.graphql
+++ b/schema/input.graphql
@@ -76,6 +76,7 @@ input ReactionBy {
   rating: Boolean
   topic: String
   created_by: Int
+  author: String
   after: Int
   sort: ReactionSort
 }