diff --git a/dns_scripts/dns_add_nsupdate b/dns_scripts/dns_add_nsupdate
index 9e8ebfe..fc55c6f 100755
--- a/dns_scripts/dns_add_nsupdate
+++ b/dns_scripts/dns_add_nsupdate
@@ -7,10 +7,4 @@ dnskeyfile="path/to/bla.key"
 fulldomain="$1"
 token="$2"
 
-updatefile=$(mktemp)
-
-printf "update add _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${fulldomain}" "${token}" > "${updatefile}"
-
-nsupdate -k "${dnskeyfile}" -v "${updatefile}"
-
-rm -f "${updatefile}"
+printf "update add _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${fulldomain}" "${token}" | nsupdate -k "${dnskeyfile}" -v "${updatefile}"