diff --git a/internal/waf/rule.go b/internal/waf/rule.go
index 7a610f6..5df6c66 100644
--- a/internal/waf/rule.go
+++ b/internal/waf/rule.go
@@ -17,7 +17,7 @@ import (
 	"github.com/iwind/TeaGo/lists"
 	"github.com/iwind/TeaGo/maps"
 	"github.com/iwind/TeaGo/types"
-	"github.com/iwind/TeaGo/utils/string"
+	stringutil "github.com/iwind/TeaGo/utils/string"
 	"net"
 	"reflect"
 	"regexp"