diff --git a/go.mod b/go.mod
index 44b3012..76a8640 100644
--- a/go.mod
+++ b/go.mod
@@ -10,6 +10,7 @@ require (
 	github.com/gomodule/redigo v1.8.8
 	github.com/iGoogle-ink/gopay v1.5.36
 	github.com/pkg/errors v0.9.1
+	github.com/shopspring/decimal v1.2.0
 	github.com/syyongx/php2go v0.9.7
 	go.uber.org/zap v1.16.0
 	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97