diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 2c3bc65..1f1475b 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -20,6 +20,7 @@ import (
 	"github.com/Mrs4s/MiraiGo/message"
 	"github.com/Mrs4s/MiraiGo/utils"
 	b14 "github.com/fumiama/go-base16384"
+	"github.com/segmentio/asm/base64"
 	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 
@@ -1122,7 +1123,7 @@ func (bot *CQBot) makeImageOrVideoElem(d map[string]string, video bool, sourceTy
 		return &LocalImageElement{File: fu.Path, URL: f}, nil
 	}
 	if !video && strings.HasPrefix(f, "base64") {
-		b, err := param.Base64DecodeString(strings.TrimPrefix(f, "base64://"))
+		b, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(f, "base64://"))
 		if err != nil {
 			return nil, err
 		}
diff --git a/global/fs.go b/global/fs.go
index ccfac88..f985dd5 100644
--- a/global/fs.go
+++ b/global/fs.go
@@ -14,9 +14,8 @@ import (
 
 	"github.com/Mrs4s/MiraiGo/utils"
 	b14 "github.com/fumiama/go-base16384"
+	"github.com/segmentio/asm/base64"
 	log "github.com/sirupsen/logrus"
-
-	"github.com/Mrs4s/go-cqhttp/internal/param"
 )
 
 const (
@@ -89,7 +88,7 @@ func FindFile(file, cache, p string) (data []byte, err error) {
 			return nil, err
 		}
 	case strings.HasPrefix(file, "base64"):
-		data, err = param.Base64DecodeString(strings.TrimPrefix(file, "base64://"))
+		data, err = base64.StdEncoding.DecodeString(strings.TrimPrefix(file, "base64://"))
 		if err != nil {
 			return nil, err
 		}
diff --git a/internal/param/param.go b/internal/param/param.go
index fd86b74..19da7fc 100644
--- a/internal/param/param.go
+++ b/internal/param/param.go
@@ -7,8 +7,6 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/Mrs4s/MiraiGo/utils"
-	"github.com/segmentio/asm/base64"
 	"github.com/tidwall/gjson"
 )
 
@@ -83,13 +81,3 @@ func SplitURL(s string) []string {
 	result = append(result, s[last:])
 	return result
 }
-
-// Base64DecodeString decode base64 with avx2
-// see https://github.com/segmentio/asm/issues/50
-// avoid incorrect unsafe usage in origin library
-func Base64DecodeString(s string) ([]byte, error) {
-	e := base64.StdEncoding
-	dst := make([]byte, e.DecodedLen(len(s)))
-	n, err := e.Decode(dst, utils.S2B(s))
-	return dst[:n], err
-}