diff --git a/go.mod b/go.mod
index c71f27c..6384d85 100644
--- a/go.mod
+++ b/go.mod
@@ -12,6 +12,7 @@ require (
 	github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416
 	github.com/prometheus/client_golang v1.18.0
 	github.com/stretchr/testify v1.8.4
+	github.com/tredeske/u v0.0.0-20240301202545-cc23fee03f7c
 	go.uber.org/multierr v1.11.0
 	go.uber.org/zap v1.26.0
 )
diff --git a/go.sum b/go.sum
index 3dae5cf..ef7a605 100644
--- a/go.sum
+++ b/go.sum
@@ -2315,8 +2315,9 @@ github.com/lib/pq v1.8.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.9.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.10.4/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.10.6/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
-github.com/lib/pq v1.10.7 h1:p7ZhMD+KsSRozJr34udlUrhboJwWAgCg34+/ZZNvZZw=
 github.com/lib/pq v1.10.7/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
+github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/libp2p/go-addr-util v0.0.2/go.mod h1:Ecd6Fb3yIuLzq4bD7VcywcVSBtefcAwnUISBM3WG15E=
 github.com/libp2p/go-addr-util v0.1.0/go.mod h1:6I3ZYuFr2O/9D+SoyM0zEw0EF3YkldtTX406BpdQMqw=
 github.com/libp2p/go-buffer-pool v0.0.1/go.mod h1:xtyIz9PMobb13WaxR6Zo1Pd1zXJKYg0a8KiIvDp3TzQ=
@@ -3462,6 +3463,8 @@ github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea/go.mod h1:WPnis/6
 github.com/tonistiigi/vt100 v0.0.0-20210615222946-8066bb97264f/go.mod h1:ulncasL3N9uLrVann0m+CDlJKWsIAP34MPcOJF6VRvc=
 github.com/trailofbits/go-mutexasserts v0.0.0-20200708152505-19999e7d3cef/go.mod h1:+SV/613m53DNAmlXPTWGZhIyt4E/qDvn9g/lOPRiy0A=
 github.com/trailofbits/go-mutexasserts v0.0.0-20230328101604-8cdbc5f3d279/go.mod h1:GA3+Mq3kt3tYAfM0WZCu7ofy+GW9PuGysHfhr+6JX7s=
+github.com/tredeske/u v0.0.0-20240301202545-cc23fee03f7c h1:x7NJo4wXqdtCdfEXLd42HunCXHy2b9/TeW7vM4W5G7Q=
+github.com/tredeske/u v0.0.0-20240301202545-cc23fee03f7c/go.mod h1:/9Soq9m+Gmq7qhvNzdO/CjOFGol1MuZFvWY2iMHzsgw=
 github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
 github.com/tv42/httpunix v0.0.0-20191220191345-2ba4b9c3382c/go.mod h1:hzIxponao9Kjc7aWznkXaL4U4TWaDSs8zcsY4Ka08nM=
 github.com/twitchtv/twirp v7.1.0+incompatible/go.mod h1:RRJoFSAmTEh2weEqWtpPE3vFK5YBhA6bqp2l1kfCC5A=
diff --git a/service/sentry.go b/service/sentry.go
index b926bda..863d3ce 100644
--- a/service/sentry.go
+++ b/service/sentry.go
@@ -12,11 +12,11 @@ import (
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/tredeske/u/ustrings"
 
 	"github.com/bnb-chain/bsc-mev-sentry/account"
 	"github.com/bnb-chain/bsc-mev-sentry/log"
 	"github.com/bnb-chain/bsc-mev-sentry/node"
-	"github.com/bnb-chain/bsc-mev-sentry/utils"
 )
 
 var (
@@ -198,11 +198,11 @@ func timeoutCancel(ctx *context.Context, timeout Duration) func() {
 type Duration time.Duration
 
 func (d Duration) MarshalText() ([]byte, error) {
-	return utils.UnsafeStringToBytes(time.Duration(d).String()), nil
+	return ustrings.UnsafeStringToBytes(time.Duration(d).String()), nil
 }
 
 func (d *Duration) UnmarshalText(text []byte) error {
-	dd, err := time.ParseDuration(utils.UnsafeBytesToString(text))
+	dd, err := time.ParseDuration(ustrings.UnsafeBytesToString(text))
 	*d = Duration(dd)
 	return err
 }
diff --git a/utils/string.go b/utils/string.go
deleted file mode 100644
index 2f4eb4f..0000000
--- a/utils/string.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package utils
-
-import (
-	"reflect"
-	"unsafe"
-)
-
-// UnsafeStringToBytes converts string to []byte without memory copy.
-// The return []byte is readonly since it ref to the string's content,
-// and golang strings are immutable.
-func UnsafeStringToBytes(str string) []byte {
-	var buf []byte
-	*(*string)(unsafe.Pointer(&buf)) = str
-	(*reflect.SliceHeader)(unsafe.Pointer(&buf)).Cap = len(str)
-	return buf
-}
-
-// UnsafeBytesToString converts []bytes to string without memory copy.
-// The return string is not immutable since it ref to the []byte's content,
-// and []byte is writable.
-func UnsafeBytesToString(raw []byte) string {
-	return *(*string)(unsafe.Pointer(&raw))
-}