diff --git a/coolq/api.go b/coolq/api.go
index b40e4a3..5808cc1 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -3,6 +3,7 @@ package coolq
 import (
 	"crypto/md5"
 	"encoding/hex"
+	"fmt"
 	"io/ioutil"
 	"math"
 	"os"