diff --git a/pkg/obioptions/version.go b/pkg/obioptions/version.go
index 51e3ef7..762836d 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 = "9965370"
+var _Commit = "add9d89"
 var _Version = "Release 4.4.0"
 
 // Version returns the version of the obitools package.
diff --git a/pkg/obitools/obimatrix/obimatrix.go b/pkg/obitools/obimatrix/obimatrix.go
index a7b0b9e..a08a31c 100644
--- a/pkg/obitools/obimatrix/obimatrix.go
+++ b/pkg/obitools/obimatrix/obimatrix.go
@@ -79,7 +79,11 @@ func (data1 *MatrixData) MergeMatrixData(data2 *MatrixData) *MatrixData {
 // - *MatrixData: The updated MatrixData object.
 func (data *MatrixData) Update(s *obiseq.BioSequence, mapkey string) *MatrixData {
 	if v, ok := s.GetAttribute(mapkey); ok {
-		if obiutils.IsAMap(v) {
+		if m, ok := v.(*obiseq.StatsOnValues); ok {
+			m.RLock()
+			(*data)[s.Id()] = obiutils.MapToMapInterface(m.Map())
+			m.RUnlock()
+		} else if obiutils.IsAMap(v) {
 			(*data)[s.Id()] = obiutils.MapToMapInterface(v)
 		} else {
 			log.Panicf("Attribute %s is not a map in the sequence %s", mapkey, s.Id())