readme: fix levels

README.md

diff --git a/README.md b/README.md
index 108fb75..e1ff807 100644
--- a/README.md
+++ b/README.md
@@ -191,10 +191,10 @@
 
 ```go
 // Will log anything that is info or above (warn, error, fatal, panic). Default.
-log.Level = logrus.Info
+log.Level = logrus.InfoLevel
 ```
 
-It may be useful to set `log.Level = logrus.Debug` in a debug or verbose
+It may be useful to set `log.Level = logrus.DebugLevel` in a debug or verbose
 environment if your application has that.
 
 #### Entries