diff --git a/README.md b/README.md
index b6f823f..b9516d0 100644
--- a/README.md
+++ b/README.md
@@ -139,5 +139,6 @@ Licensed under the [Apache License 2.0](https://github.com/b3log/wide/blob/maste
 
 ----
 
+<center>
 <img src="https://cloud.githubusercontent.com/assets/873584/4606328/4e848b96-5219-11e4-8db1-fa12774b57b4.png" width="256px" />
 </center>