diff --git a/string.go b/string.go
index 0e337a3..f0249f4 100644
--- a/string.go
+++ b/string.go
@@ -35,7 +35,7 @@ func Set(key, value string, ttl string, url ...string) (string, error) {
 	conn, _, err := Conn(url...)
 
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 	defer conn.Close()
 
@@ -46,7 +46,7 @@ func Set(key, value string, ttl string, url ...string) (string, error) {
 	err = conn.Set(req, res)
 
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 
 	return res.GetRet(), nil
@@ -58,7 +58,7 @@ func Del(key string, url ...string) (string, error) {
 	conn, _, err := Conn(url...)
 
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 	defer conn.Close()
 
@@ -69,7 +69,7 @@ func Del(key string, url ...string) (string, error) {
 	err = conn.Del(req, res)
 
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 
 	return res.GetRet(), nil