diff --git a/main.go b/main.go
index 3a3c83f..5ca5192 100644
--- a/main.go
+++ b/main.go
@@ -46,7 +46,7 @@ func init() {
 		"iana-tld-list":  "https://data.iana.org/TLD/tlds-alpha-by-domain.txt",
 		"internic-root":  "https://www.internic.net/domain/named.root",
 		"opennic-filter": strings.Join([]string{".", "opennic.glue."}, ","),
-		"opennic-root":   "75.127.96.89:53",
+		"opennic-root":   "75.127.96.89",
 	})
 	if err := rconfig.ParseAndValidate(&cfg); err != nil {
 		log.Fatalf("Unable to parse commandline options: %s", err)
@@ -128,7 +128,7 @@ func setRootsFromTLDs(roots map[string][]string, rootsMutex *sync.Mutex, tlds []
 
 			masters, err := resolver(tld)
 			if err != nil {
-				log.WithError(err).WithField("zone", tld).Error("Unable to retrieve zone masters")
+				log.WithError(err).WithField("zone", tld).Fatal("Unable to retrieve zone masters")
 				return
 			}
 
diff --git a/opennic.go b/opennic.go
index acf8c26..eccccb0 100644
--- a/opennic.go
+++ b/opennic.go
@@ -13,7 +13,7 @@ func getOpenNICTLDs() ([]string, error) {
 	m := new(dns.Msg)
 	m.SetQuestion("tlds.opennic.glue.", dns.TypeTXT)
 
-	r, _, err := c.Exchange(m, cfg.OpenNICRoot)
+	r, _, err := c.Exchange(m, cfg.OpenNICRoot+":53")
 	if err != nil {
 		return nil, errors.Wrap(err, "Could not query nameservers")
 	}
@@ -42,7 +42,7 @@ func getOpenNICZoneMasters(tld string) ([]string, error) {
 	m := new(dns.Msg)
 	m.SetQuestion(tld+"opennic.glue.", dns.TypeCNAME)
 
-	r, _, err := c.Exchange(m, cfg.OpenNICRoot)
+	r, _, err := c.Exchange(m, cfg.OpenNICRoot+":53")
 	if err != nil {
 		return nil, errors.Wrap(err, "Could not query nameservers")
 	}
@@ -65,7 +65,7 @@ func getOpenNICZoneMasters(tld string) ([]string, error) {
 		m = new(dns.Msg)
 		m.SetQuestion(master, dns.TypeA)
 
-		r, _, err := c.Exchange(m, cfg.OpenNICRoot)
+		r, _, err := c.Exchange(m, cfg.OpenNICRoot+":53")
 		if err != nil {
 			return nil, errors.Wrap(err, "Could not query nameservers")
 		}