diff --git a/Makefile b/Makefile
index ec6afa15..ae0bf0bb 100755
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ export GOOS = linux
 WEBUI_DIR ?= ../godoxy-frontend
 DOCS_DIR ?= ../godoxy-wiki
 
-LDFLAGS = -X github.com/yusing/go-proxy/pkg.version=${VERSION}
+LDFLAGS = -X github.com/yusing/go-proxy/pkg.version=${VERSION} -checklinkname=0
 
 ifeq ($(agent), 1)
 	NAME = godoxy-agent
diff --git a/internal/serialization/time.go b/internal/serialization/time.go
new file mode 100644
index 00000000..c35656cd
--- /dev/null
+++ b/internal/serialization/time.go
@@ -0,0 +1,21 @@
+package serialization
+
+import (
+	"time"
+	_ "unsafe"
+)
+
+//go:linkname unitMap time.unitMap
+var unitMap map[string]uint64
+
+const (
+	unitDay   uint64 = 24 * uint64(time.Hour)
+	unitWeek  uint64 = 7 * unitDay
+	unitMonth uint64 = 30 * unitDay
+)
+
+func init() {
+	unitMap["d"] = unitDay
+	unitMap["w"] = unitWeek
+	unitMap["M"] = unitMonth
+}
diff --git a/internal/serialization/time_test.go b/internal/serialization/time_test.go
new file mode 100644
index 00000000..eaebcf19
--- /dev/null
+++ b/internal/serialization/time_test.go
@@ -0,0 +1,16 @@
+package serialization
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	expect "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+// NOTE: -ldflags=-checklinkname=0 is required to test this function
+func TestParseDuration(t *testing.T) {
+	require.Equal(t, 24*time.Hour, expect.Must(time.ParseDuration("1d")))
+	require.Equal(t, 7*24*time.Hour, expect.Must(time.ParseDuration("1w")))
+	require.Equal(t, 30*24*time.Hour, expect.Must(time.ParseDuration("1M")))
+}