diff --git a/pkg/obioptions/version.go b/pkg/obioptions/version.go
index 189dfab..bb9c69c 100644
--- a/pkg/obioptions/version.go
+++ b/pkg/obioptions/version.go
@@ -3,7 +3,7 @@ package obioptions
 // Version is automatically updated by the Makefile from version.txt
 // The patch number (third digit) is incremented on each push to the repository
 
-var _Version = "Release 4.4.44"
+var _Version = "Release 4.4.45"
 
 // Version returns the version of the obitools package.
 //
diff --git a/pkg/obiseq/language.go b/pkg/obiseq/language.go
index 4738274..949082b 100644
--- a/pkg/obiseq/language.go
+++ b/pkg/obiseq/language.go
@@ -141,14 +141,14 @@ var OBILang = gval.NewLanguage(
 	gval.Function("max", func(args ...interface{}) (interface{}, error) {
 		return obiutils.Max(args[0])
 	}),
-	gval.Function("which_max", func(args ...interface{}) (interface{}, error) {
+	gval.Function("whichmax", func(args ...interface{}) (interface{}, error) {
 		result, err := obiutils.WhichMax(args[0])
 		if idx, ok := result.(int); ok {
 			return float64(idx), nil
 		}
 		return result, err
 	}),
-	gval.Function("which_min", func(args ...interface{}) (interface{}, error) {
+	gval.Function("whichmin", func(args ...interface{}) (interface{}, error) {
 		result, err := obiutils.WhichMin(args[0])
 		if idx, ok := result.(int); ok {
 			return float64(idx), nil
diff --git a/version.txt b/version.txt
index 06aaa0b..6d15861 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-4.4.44
+4.4.45