diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 22d89699bd..6e6ff7f83b 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -13,8 +13,8 @@ object Dependencies {
   val allScalaVersions = Seq(defaultScalaVersion, scala210, scala211, scala213)
   val scala212_213 = Seq(defaultScalaVersion, scala213)
 
-  private val ioVersion = nightlyVersion.getOrElse("1.6.0-M1")
-  private val utilVersion = nightlyVersion.getOrElse("1.6.0-M1")
+  private val ioVersion = nightlyVersion.getOrElse("1.6.0-M2")
+  private val utilVersion = nightlyVersion.getOrElse("1.6.0-RC1")
 
   private val sbtIO = "org.scala-sbt" %% "io" % ioVersion