diff --git a/project/plugins.sbt b/project/plugins.sbt
index edb0b67e..05603f9a 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -2,7 +2,7 @@ resolvers += "jgit-repo" at "http://download.eclipse.org/jgit/maven"
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.6.3")
 
-addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.3.3")
+addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.0")
 
 addSbtPlugin("com.eed3si9n" % "sbt-unidoc" % "0.4.2")