diff --git a/main.go b/main.go
index e034b85..388d918 100644
--- a/main.go
+++ b/main.go
@@ -193,15 +193,13 @@ func (c *MetricsCollector) signatureOk(zone string) (bool, int, error) {
 	if err != nil {
 		return false, rsoa.MsgHdr.Rcode, err
 	}
-	level.Debug(c.Log).Log(fmt.Sprintf("SOA header: %+v\n", rsoa.MsgHdr))
+	_ = level.Debug(c.Log).Log(fmt.Sprintf("SOA header: %+v\n", rsoa.MsgHdr))
 	return rsoa.MsgHdr.AuthenticatedData && rsoa.MsgHdr.Rcode == dns.RcodeSuccess, rsoa.MsgHdr.Rcode, nil
 }
 
 func (c *MetricsCollector) cdsDsMatches(zone string) (int, int, int, int, bool, error) {
 	dsCount := 0
-	dsRcode := -1
 	cdsCount := 0
-	cdsRcode := -1
 	match := false
 	var dsdata []DsData
 	var cdsdata []DsData
@@ -209,11 +207,11 @@ func (c *MetricsCollector) cdsDsMatches(zone string) (int, int, int, int, bool,
 	qcds := new(dns.Msg)
 	qcds.SetQuestion(dns.Fqdn(zone), dns.TypeCDS)
 	rcds, _, err1 := c.DNS.Exchange(qcds, c.Resolver)
-	cdsRcode = rcds.MsgHdr.Rcode
+	cdsRcode := rcds.MsgHdr.Rcode
 	if err1 == nil {
 		cdsCount = len(rcds.Answer)
 		cdsdata = make([]DsData, len(rcds.Answer))
-		level.Debug(c.Log).Log(fmt.Sprintf("CDS data: %+v\n", rcds.Answer))
+		_ = level.Debug(c.Log).Log(fmt.Sprintf("CDS data: %+v\n", rcds.Answer))
 		for i, a := range rcds.Answer {
 			ds := a.(*dns.CDS).DS
 			cdsdata[i] = DsData{
@@ -229,11 +227,11 @@ func (c *MetricsCollector) cdsDsMatches(zone string) (int, int, int, int, bool,
 	qds := new(dns.Msg)
 	qds.SetQuestion(dns.Fqdn(zone), dns.TypeDS)
 	rds, _, err2 := c.DNS.Exchange(qds, c.Resolver)
-	dsRcode = rds.MsgHdr.Rcode
+	dsRcode := rds.MsgHdr.Rcode
 	if err2 == nil {
 		dsCount = len(rds.Answer)
 		dsdata = make([]DsData, len(rds.Answer))
-		level.Debug(c.Log).Log(fmt.Sprintf("DS data: %+v\n", rds.Answer))
+		_ = level.Debug(c.Log).Log(fmt.Sprintf("DS data: %+v\n", rds.Answer))
 		for i, a := range rds.Answer {
 			ds := a.(*dns.DS)
 			dsdata[i] = DsData{
@@ -295,12 +293,12 @@ func main() {
 	if configFile != nil {
 		content, err := ioutil.ReadFile(*configFile)
 		if err != nil {
-			level.Error(logger).Log(err.Error())
+			_ = level.Error(logger).Log(err.Error())
 			os.Exit(1)
 		}
 		err = yaml.Unmarshal(content, &config)
 		if err != nil {
-			level.Error(logger).Log(err.Error())
+			_ = level.Error(logger).Log(err.Error())
 			os.Exit(1)
 		}
 	}
@@ -315,5 +313,5 @@ func main() {
 	prom.MustRegister(metricsCollector)
 	http.Handle(*metricsPath, promhttp.Handler())
 	server := &http.Server{Addr: *listenAddress}
-	logger.Log(web.ListenAndServe(server, *webConfigFile, logger))
+	_ = logger.Log(web.ListenAndServe(server, *webConfigFile, logger))
 }