diff --git a/addr-map.go b/addr-map.go
index 762ed28..d6a2149 100644
--- a/addr-map.go
+++ b/addr-map.go
@@ -8,8 +8,6 @@ import (
 	"net"
 	"sync"
 	"time"
-
-	"github.com/cespare/xxhash/v2"
 )
 
 const (
@@ -92,6 +90,13 @@ func addrMapGet(srcIp net.IP, dstCidr *net.IPNet, ttl uint32) net.IP {
 		if err != nil {
 			log.Fatalf("rand.Read(): error %v", err)
 		}
+		var hkey any
+		switch addrlen {
+		case net.IPv4len:
+			hkey = binary.NativeEndian.Uint32(curr.SrcAddr)
+		case net.IPv6len:
+			hkey = binary.NativeEndian.Uint64(curr.SrcAddr[net.IPv6len/2:])
+		}
 
 		// adjust random bytes to dstCidr
 		for i := range addrlen / 4 {
@@ -101,7 +106,6 @@ func addrMapGet(srcIp net.IP, dstCidr *net.IPNet, ttl uint32) net.IP {
 			a += (b & ^m)
 			binary.NativeEndian.PutUint32(curr.SrcAddr[i*4:], a)
 		}
-		hsum := xxhash.Sum64(curr.SrcAddr)
 
 		curr.Created = time.Now()
 
@@ -109,9 +113,9 @@ func addrMapGet(srcIp net.IP, dstCidr *net.IPNet, ttl uint32) net.IP {
 		var loaded bool
 		switch addrlen {
 		case net.IPv4len:
-			xprev, loaded = addr4.LoadOrStore(hsum, curr)
+			xprev, loaded = addr4.LoadOrStore(hkey, curr)
 		case net.IPv6len:
-			xprev, loaded = addr6.LoadOrStore(hsum, curr)
+			xprev, loaded = addr6.LoadOrStore(hkey, curr)
 		}
 		if !loaded {
 			// early return
@@ -135,9 +139,9 @@ func addrMapGet(srcIp net.IP, dstCidr *net.IPNet, ttl uint32) net.IP {
 		if prev.GetTtl() < int32(curr.Ttl) {
 			switch addrlen {
 			case net.IPv4len:
-				addr4.Store(hsum, curr)
+				addr4.Store(hkey, curr)
 			case net.IPv6len:
-				addr6.Store(hsum, curr)
+				addr6.Store(hkey, curr)
 			}
 		}
 
diff --git a/go.mod b/go.mod
index d141b4b..231b5ad 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module git.krd.sh/krd/powerdns-remote-http-example
 go 1.22
 
 require (
-	github.com/cespare/xxhash/v2 v2.3.0
 	github.com/gin-gonic/gin v1.10.0
 	github.com/google/nftables v0.2.0
 	github.com/miekg/dns v1.1.59
@@ -14,6 +13,7 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bytedance/sonic v1.11.8 // indirect
 	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
 	github.com/cloudwego/iasm v0.2.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.4 // indirect