diff --git a/README.md b/README.md
index b8c81c6..89cab29 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-<a href="http://pythoninchemistry.org/pylj"><img src="https://github.com/arm61/pylj/blob/master/logo/logo.png?raw=true" width= "80%"/></a>
+<center><a href="http://pythoninchemistry.org/pylj"><img src="https://github.com/arm61/pylj/blob/master/logo/logo.png?raw=true" width= "60%"/></a></center>
 
 ## Visit the [pylj](http://pythoninchemistry.org/pylj) webpage for more information about pylj.