diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 0f75498a2..95e1dc022 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -7,7 +7,7 @@ object Dependencies {
 
   def nightlyVersion: Option[String] = sys.props.get("sbt.build.version")
 
-  private val ioVersion = nightlyVersion.getOrElse("1.3.1")
+  private val ioVersion = nightlyVersion.getOrElse("1.4.0-M2")
   private val utilVersion = nightlyVersion.getOrElse("1.3.2")
 
   private val sbtIO = "org.scala-sbt" %% "io" % ioVersion
diff --git a/project/build.properties b/project/build.properties
index 6adcdc753..00b48d978 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.3
+sbt.version=1.3.6