fixed README

zonyitoo · zonyitoo · commit 8805a57da2c8 · 2017-06-24T00:25:53.000+08:00
diff --git a/README.md b/README.md
@@ -16,7 +16,7 @@ This crate works with Cargo and can be found on
 
 ```toml
 [dependencies]
-bson = "0.8"
+bson = "0.9"
 ```
 
 ## Usage
