diff --git a/dns_server.go b/dns_server.go
index ce146f52..1a6701be 100644
--- a/dns_server.go
+++ b/dns_server.go
@@ -34,9 +34,7 @@ func newDnsRecords(l *logrus.Logger) *dnsRecords {
 	}
 }
 
-func (d *dnsRecords) AddA(name string, addresses []netip.Addr) {
-	d.Lock()
-	defer d.Unlock()
+func (d *dnsRecords) addA(name string, addresses []netip.Addr) {
 	q := dns.Question{Name: name, Qclass: dns.ClassINET, Qtype: dns.TypeA}
 	d.dnsMap[q] = nil
 
@@ -50,11 +48,9 @@ func (d *dnsRecords) AddA(name string, addresses []netip.Addr) {
 			}
 		}
 	}
-}
+} 
 
-func (d *dnsRecords) AddAAAA(name string, addresses []netip.Addr) {
-	d.Lock()
-	defer d.Unlock()
+func (d *dnsRecords) addAAAA(name string, addresses []netip.Addr) {
 	q := dns.Question{Name: name, Qclass: dns.ClassINET, Qtype: dns.TypeAAAA}
 	d.dnsMap[q] = nil
 
@@ -68,12 +64,9 @@ func (d *dnsRecords) AddAAAA(name string, addresses []netip.Addr) {
 			}
 		}
 	}
-}
-
-func (d *dnsRecords) AddPTR(name string, addresses []netip.Addr) {
-	d.Lock()
-	defer d.Unlock()
+} 
 
+func (d *dnsRecords) addPTR(name string, addresses []netip.Addr) {
 	for _, addr := range addresses {
 		arpa, err := dns.ReverseAddr(addr.String())
 		if err == nil {
@@ -86,11 +79,9 @@ func (d *dnsRecords) AddPTR(name string, addresses []netip.Addr) {
 			}
 		}
 	}
-}
+} 
 
-func (d *dnsRecords) AddTXT(name string, crt cert.Certificate) {
-	d.Lock()
-	defer d.Unlock()
+func (d *dnsRecords) addTXT(name string, crt cert.Certificate) {
 	q := dns.Question{Name: name, Qclass: dns.ClassINET, Qtype: dns.TypeTXT}
 	d.dnsMap[q] = nil
 
@@ -100,14 +91,18 @@ func (d *dnsRecords) AddTXT(name string, crt cert.Certificate) {
 		d.dnsMap[q] = []dns.RR{rr}
 		d.l.Debugf("DNS record added %s", rr.String())
 	}
-}
+} 
 
 func (d *dnsRecords) Add(crt cert.Certificate, addresses []netip.Addr) {
 	host := dns.Fqdn(strings.ToLower(crt.Name() + dnsSuffix))
-	d.AddA(host, addresses)
-	d.AddAAAA(host, addresses)
-	d.AddPTR(host, addresses)
-	d.AddTXT(host, crt)
+	
+	d.Lock()
+	defer d.Unlock()
+
+	d.addA(host, addresses)
+	d.addAAAA(host, addresses)
+	d.addPTR(host, addresses)
+	d.addTXT(host, crt)
 }
 
 func (d *dnsRecords) parseQuery(m *dns.Msg) {