diff --git a/pkg/obioptions/version.go b/pkg/obioptions/version.go
index 4bb7230..51e3ef7 100644
--- a/pkg/obioptions/version.go
+++ b/pkg/obioptions/version.go
@@ -8,7 +8,7 @@ import (
 // corresponds to the last commit, and not the one when the file will be
 // commited
 
-var _Commit = "8a2bb1f"
+var _Commit = "9965370"
 var _Version = "Release 4.4.0"
 
 // Version returns the version of the obitools package.
diff --git a/pkg/obiseq/merge.go b/pkg/obiseq/merge.go
index 5d2bcc0..5fb9d67 100644
--- a/pkg/obiseq/merge.go
+++ b/pkg/obiseq/merge.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"sync"
 
+	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiutils"
 	"github.com/goccy/go-json"
 
 	log "github.com/sirupsen/logrus"
@@ -109,6 +110,24 @@ func (sov *StatsOnValues) Map() map[string]int {
 	return sov.counts
 }
 
+func (sov *StatsOnValues) Max() int {
+	data, err := obiutils.Max(sov.counts)
+	if err != nil {
+		return -1
+	}
+
+	return data.(int)
+}
+
+func (sov *StatsOnValues) Min() int {
+	data, err := obiutils.Min(sov.counts)
+	if err != nil {
+		return -1
+	}
+
+	return data.(int)
+}
+
 func (sov *StatsOnValues) Set(key string, value int) {
 	if sov == nil {
 		return
diff --git a/pkg/obiutils/minmax.go b/pkg/obiutils/minmax.go
index f6b0e40..b01dfc1 100644
--- a/pkg/obiutils/minmax.go
+++ b/pkg/obiutils/minmax.go
@@ -78,6 +78,12 @@ func MinMap[K comparable, T constraints.Ordered](values map[K]T) (K, T, error) {
 // Returns an error if the container is empty or the type is unsupported.
 func Min(data interface{}) (interface{}, error) {
 	v := reflect.ValueOf(data)
+	method := v.MethodByName("Min")
+	if method.IsValid() {
+		result := method.Call(nil)[0].Interface()
+		return result, nil
+	}
+
 	switch v.Kind() {
 	case reflect.Slice, reflect.Array:
 		if v.Len() == 0 {
@@ -103,6 +109,13 @@ func Min(data interface{}) (interface{}, error) {
 // Returns an error if the container is empty or the type is unsupported.
 func Max(data interface{}) (interface{}, error) {
 	v := reflect.ValueOf(data)
+
+	method := v.MethodByName("Max")
+	if method.IsValid() {
+		result := method.Call(nil)[0].Interface()
+		return result, nil
+	}
+
 	switch v.Kind() {
 	case reflect.Slice, reflect.Array:
 		if v.Len() == 0 {