diff --git a/project/Build.scala b/project/Build.scala
index f628d161dc3d..7e4903bf9b95 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -41,7 +41,7 @@ object Build {
   val dottyOrganization = "ch.epfl.lamp"
   val dottyGithubUrl = "https://github.com/lampepfl/dotty"
   val dottyVersion = {
-    val baseVersion = "0.4.0"
+    val baseVersion = "0.4.0-RC1"
     val isNightly = sys.env.get("NIGHTLYBUILD") == Some("yes")
     val isRelease = sys.env.get("RELEASEBUILD") == Some("yes")
     if (isNightly)