diff --git a/Miscellaneous/web/http-request-headers/http-request-headers-common-non-standard-fields.txt b/Miscellaneous/web/http-request-headers/http-request-headers-common-non-standard-fields.txt
index edbb7468f81d..c844e66a03d6 100644
--- a/Miscellaneous/web/http-request-headers/http-request-headers-common-non-standard-fields.txt
+++ b/Miscellaneous/web/http-request-headers/http-request-headers-common-non-standard-fields.txt
@@ -20,3 +20,4 @@ X-XSRF-TOKEN
 Client-IP
 True-Client-IP
 Cluster-Client-IP
+fiona>=1.10b2 # not directly required, pinned by Snyk to avoid a vulnerability