diff --git a/utils/identity.go b/utils/identity.go
index f0e70ff..d0642ee 100644
--- a/utils/identity.go
+++ b/utils/identity.go
@@ -1,31 +1,9 @@
 package utils
 
 import (
-	"strconv"
-
-	"github.com/google/uuid"
-	"github.com/jaevor/go-nanoid"
 	ulid "github.com/oklog/ulid/v2"
 )
 
-func NanoID() string {
-	nanoid, _ := nanoid.CustomASCII("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 21)
-	return nanoid()
-}
-
-func NanoIDInt() (id int64, err error) {
-	decenaryID, err := nanoid.CustomASCII("0123456789", 18)
-	if err != nil {
-		return
-	}
-	id, err = strconv.ParseInt(decenaryID(), 10, 64)
-	return
-}
-
-func UUID() string {
-	return uuid.NewString()
-}
-
 func ULID() string {
 	return ulid.Make().String()
 }
diff --git a/utils/net.go b/utils/net.go
index 50f86b6..285d77d 100644
--- a/utils/net.go
+++ b/utils/net.go
@@ -99,7 +99,7 @@ func HttpPost(url string, header map[string]string, data []byte) ([]byte, error)
 	}
 
 	request.Header.Set("Content-Type", "application/json;charset=UTF-8")
-	request.Header.Set("Request-Id", NanoID())
+	request.Header.Set("Request-Id", ULID())
 
 	for key, val := range header {
 		request.Header.Set(key, val)