diff --git a/api/v1/swagger/paths/import_record_matches.yaml b/api/v1/swagger/paths/import_record_matches.yaml
index 67abad548c..fadd511675 100644
--- a/api/v1/swagger/paths/import_record_matches.yaml
+++ b/api/v1/swagger/paths/import_record_matches.yaml
@@ -26,6 +26,7 @@
             candidate_match_id:
               description: Candidate match to choose
               type: integer
+          additionalProperties: false
     consumes:
       - application/json
     produces: