diff --git a/backend/service/allowDeny.go b/backend/service/allowDeny.go
index a4ab6b0..99f3f33 100644
--- a/backend/service/allowDeny.go
+++ b/backend/service/allowDeny.go
@@ -127,6 +127,9 @@ func (s *AllowDeny) Update(
 	if v, err := incoming.Cidrs.Get(); err == nil {
 		current.Cidrs.Set(v)
 	}
+	if v, err := incoming.JA4Fingerprints.Get(); err == nil {
+		current.JA4Fingerprints.Set(v)
+	}
 	// allow can not be changed as it could mess up a campaign that
 	// uses multiple entries as all entries must be allow or deny.