diff --git a/README.md b/README.md
index 38c75f5bd8f..680548d8000 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The main project site is http://simulationresearch.lbl.gov/modelica.
 
 ## Current release
 
-Download [Buildings Library 3.0.0 (2016-03-29)](https://github.com/lbl-srg/modelica-buildings/releases/download/v3.0.0/Buildings-v3.0.0.zip)
+Download [Buildings Library 4.0.0 (2017-03-29)](https://github.com/lbl-srg/modelica-buildings/releases/download/v4.0.0/Buildings-v4.0.0.zip)
 
 ## License