diff --git a/core/duplicate.go b/core/duplicate.go
index bf87b54..f920549 100644
--- a/core/duplicate.go
+++ b/core/duplicate.go
@@ -2,9 +2,6 @@ package core
 
 import "regexp"
 
-const (
-	threshold = 10
-)
 const (
 	ALPHANUMERIC = "{ALPHANUMERIC}"
 )
diff --git a/vars/version.go b/vars/version.go
index 7f6d2a5..573ba84 100644
--- a/vars/version.go
+++ b/vars/version.go
@@ -2,4 +2,4 @@ package vars
 
 // VERSION number
 // 版本号
-const VERSION string = "1.4.9"
+const VERSION string = "1.5.0"