diff --git a/utils/selfdefine_base64/base.go b/utils/selfdefine_base64/base.go
index 154fc164..5c94578b 100644
--- a/utils/selfdefine_base64/base.go
+++ b/utils/selfdefine_base64/base.go
@@ -44,7 +44,7 @@ const (
 		"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
 )
 
-const encodeStd = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789#@"
+const encodeStd = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@"
 const encodeURL = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
 
 // NewEncoding returns a new padded Encoding defined by the given alphabet,