diff --git a/container/value_test.go b/container/value_test.go
index 4433670..77a4188 100644
--- a/container/value_test.go
+++ b/container/value_test.go
@@ -7,8 +7,6 @@ import (
 	"sync"
 	"sync/atomic"
 	"testing"
-
-	"github.com/sunshineplan/utils"
 )
 
 func TestValue(t *testing.T) {
@@ -41,7 +39,7 @@ func TestPointType(t *testing.T) {
 	if v := v.Load(); v != nil {
 		t.Fatalf("wrong value: got %v, want nil", v)
 	}
-	if old := v.Swap(utils.Ptr(1)); old != nil {
+	if old := v.Swap(new(1)); old != nil {
 		t.Fatalf("wrong value: got %v, want nil", v)
 	}
 }
diff --git a/go.mod b/go.mod
index 466e7d8..b137658 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/sunshineplan/utils
 
-go 1.25
+go 1.26
diff --git a/ptr.go b/ptr.go
deleted file mode 100644
index 645c64b..0000000
--- a/ptr.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package utils
-
-func Ptr[T any](t T) *T { return &t }
diff --git a/scheduler/schedule.go b/scheduler/schedule.go
index 9dba746..6217493 100644
--- a/scheduler/schedule.go
+++ b/scheduler/schedule.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/sunshineplan/utils"
 	"github.com/sunshineplan/utils/clock"
 )
 
@@ -223,7 +222,7 @@ func ISOWeekSchedule(year int, week int, weekday *time.Weekday, clock *Clock) Sc
 func Weekday(weekday ...time.Weekday) Schedule {
 	var s multiSched
 	for _, weekday := range weekday {
-		s = append(s, ISOWeekSchedule(0, 0, utils.Ptr(weekday), FullClock()))
+		s = append(s, ISOWeekSchedule(0, 0, new(weekday), FullClock()))
 	}
 	return s
 }
diff --git a/scheduler/schedule_test.go b/scheduler/schedule_test.go
index dc88b4f..79dfdb5 100644
--- a/scheduler/schedule_test.go
+++ b/scheduler/schedule_test.go
@@ -3,8 +3,6 @@ package scheduler
 import (
 	"testing"
 	"time"
-
-	"github.com/sunshineplan/utils"
 )
 
 const format = "2006/01/02 15:04:05"
@@ -70,25 +68,25 @@ func TestISOWeekScheduleNext(t *testing.T) {
 		t    string
 		next string
 	}{
-		{ISOWeekSchedule(2000, 1, utils.Ptr(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
-		{ISOWeekSchedule(2000, 1, utils.Ptr(time.Monday), nil), "1900/12/15 12:00:00", "2000/01/03 00:00:00"},
-		{ISOWeekSchedule(2000, 1, utils.Ptr(time.Monday), nil), "2000/01/15 12:00:00", "0001/01/01 00:00:00"},
+		{ISOWeekSchedule(2000, 1, new(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
+		{ISOWeekSchedule(2000, 1, new(time.Monday), nil), "1900/12/15 12:00:00", "2000/01/03 00:00:00"},
+		{ISOWeekSchedule(2000, 1, new(time.Monday), nil), "2000/01/15 12:00:00", "0001/01/01 00:00:00"},
 
-		{ISOWeekSchedule(0, 1, utils.Ptr(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
-		{ISOWeekSchedule(0, 1, utils.Ptr(time.Monday), nil), "1900/12/15 12:00:00", "1900/12/31 00:00:00"},
-		{ISOWeekSchedule(0, 1, utils.Ptr(time.Monday), nil), "2000/01/15 12:00:00", "2001/01/01 00:00:00"},
+		{ISOWeekSchedule(0, 1, new(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
+		{ISOWeekSchedule(0, 1, new(time.Monday), nil), "1900/12/15 12:00:00", "1900/12/31 00:00:00"},
+		{ISOWeekSchedule(0, 1, new(time.Monday), nil), "2000/01/15 12:00:00", "2001/01/01 00:00:00"},
 
-		{ISOWeekSchedule(2000, 0, utils.Ptr(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
-		{ISOWeekSchedule(2000, 0, utils.Ptr(time.Monday), nil), "2000/01/01 12:00:00", "2000/01/03 00:00:00"},
-		{ISOWeekSchedule(2000, 0, utils.Ptr(time.Monday), nil), "2000/01/05 12:00:00", "2000/01/10 00:00:00"},
+		{ISOWeekSchedule(2000, 0, new(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
+		{ISOWeekSchedule(2000, 0, new(time.Monday), nil), "2000/01/01 12:00:00", "2000/01/03 00:00:00"},
+		{ISOWeekSchedule(2000, 0, new(time.Monday), nil), "2000/01/05 12:00:00", "2000/01/10 00:00:00"},
 
 		{ISOWeekSchedule(2000, 1, nil, nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
 		{ISOWeekSchedule(2000, 1, nil, nil), "2000/01/02 12:00:00", "2000/01/03 00:00:00"},
 		{ISOWeekSchedule(2000, 1, nil, nil), "2000/01/10 12:00:00", "0001/01/01 00:00:00"},
 
-		{ISOWeekSchedule(0, 0, utils.Ptr(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
-		{ISOWeekSchedule(0, 0, utils.Ptr(time.Monday), nil), "1900/12/15 12:00:00", "1900/12/17 00:00:00"},
-		{ISOWeekSchedule(0, 0, utils.Ptr(time.Monday), nil), "2000/01/15 12:00:00", "2000/01/17 00:00:00"},
+		{ISOWeekSchedule(0, 0, new(time.Monday), nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
+		{ISOWeekSchedule(0, 0, new(time.Monday), nil), "1900/12/15 12:00:00", "1900/12/17 00:00:00"},
+		{ISOWeekSchedule(0, 0, new(time.Monday), nil), "2000/01/15 12:00:00", "2000/01/17 00:00:00"},
 
 		{ISOWeekSchedule(2000, 0, nil, nil), "2000/01/03 12:00:00", "2000/01/03 12:00:01"},
 		{ISOWeekSchedule(2000, 0, nil, nil), "2000/01/01 12:00:00", "2000/01/03 00:00:00"},