diff --git a/middleware/cache.go b/middleware/cache.go
index 48f6d3e5..2766ec4b 100644
--- a/middleware/cache.go
+++ b/middleware/cache.go
@@ -103,7 +103,7 @@ func defaultCacheKeyAlgorithm(ctx echo.Context) string {
 		}
 	}
 
-	sort.Sort(sort.StringSlice(keys))
+	sort.Strings(keys)
 
 	buffer := goutils.NewBuffer()
 	for _, k := range keys {