diff --git a/build.sbt b/build.sbt
index 26ca258f..28cbba61 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ lazy val commonSettings = Seq(
   // circular dependencies with sub-projects
 
   organization := "in.co.uproot",
-  version := "0.3.2",
+  version := "0.4.0",
   scalaVersion := "2.12.1",
   scalacOptions := List("-deprecation", "-opt:_"),
   wartremoverWarnings ++= Warts.allBut(Wart.ToString, Wart.Throw),