diff --git a/lib/dns/kasp.c b/lib/dns/kasp.c
index 0cbd0cdc69..d53abfb64c 100644
--- a/lib/dns/kasp.c
+++ b/lib/dns/kasp.c
@@ -28,7 +28,7 @@
 #include <dns/log.h>
 
 /* Default TTLsig (maximum zone ttl) */
-#define DEFAULT_TTLSIG 86400
+#define DEFAULT_TTLSIG 604800 /* one week */
 
 isc_result_t
 dns_kasp_create(isc_mem_t *mctx, const char *name, dns_kasp_t **kaspp) {