diff --git a/engine.go b/engine.go
index 2b6f78d..ab10d0e 100644
--- a/engine.go
+++ b/engine.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/csv"
 	"encoding/json"
 	"fmt"