diff --git a/extras/utils/portunion.go b/extras/utils/portunion.go
index 07326e4..f76a6fd 100644
--- a/extras/utils/portunion.go
+++ b/extras/utils/portunion.go
@@ -1,7 +1,6 @@
 package utils
 
 import (
-	"math"
 	"sort"
 	"strconv"
 	"strings"
@@ -75,7 +74,7 @@ func (u PortUnion) Normalize() PortUnion {
 	normalized := PortUnion{u[0]}
 	for _, current := range u[1:] {
 		last := &normalized[len(normalized)-1]
-		if current.Start <= last.End+1 {
+		if uint32(current.Start) <= uint32(last.End)+1 {
 			if current.End > last.End {
 				last.End = current.End
 			}
@@ -90,11 +89,8 @@ func (u PortUnion) Normalize() PortUnion {
 func (u PortUnion) Ports() []uint16 {
 	var ports []uint16
 	for _, r := range u {
-		for i := r.Start; i <= r.End; i++ {
-			ports = append(ports, i)
-			if i == math.MaxUint16 {
-				break
-			}
+		for i := uint32(r.Start); i <= uint32(r.End); i++ {
+			ports = append(ports, uint16(i))
 		}
 	}
 	return ports
diff --git a/extras/utils/portunion_test.go b/extras/utils/portunion_test.go
index 0a9bd0c..ba056a3 100644
--- a/extras/utils/portunion_test.go
+++ b/extras/utils/portunion_test.go
@@ -52,6 +52,16 @@ func TestParsePortUnion(t *testing.T) {
 			s:    "5678,1200-1236,9100-9012,1234-1240",
 			want: PortUnion{{1200, 1240}, {5678, 5678}, {9012, 9100}},
 		},
+		{
+			name: "multiple ports and ranges with 65535 (reversed, unsorted, overlapping)",
+			s:    "5678,1200-1236,65531-65535,65532-65534,9100-9012,1234-1240",
+			want: PortUnion{{1200, 1240}, {5678, 5678}, {9012, 9100}, {65531, 65535}},
+		},
+		{
+			name: "multiple ports and ranges with 65535 (reversed, unsorted, overlapping) 2",
+			s:    "5678,1200-1236,65532-65535,65531-65534,9100-9012,1234-1240",
+			want: PortUnion{{1200, 1240}, {5678, 5678}, {9012, 9100}, {65531, 65535}},
+		},
 		{
 			name: "invalid 1",
 			s:    "1234-",