diff --git a/main/src/main/scala/sbt/PluginCross.scala b/main/src/main/scala/sbt/PluginCross.scala
index 0e9e1462d..9828b42a7 100644
--- a/main/src/main/scala/sbt/PluginCross.scala
+++ b/main/src/main/scala/sbt/PluginCross.scala
@@ -92,8 +92,8 @@ private[sbt] object PluginCross {
   def scalaVersionFromSbtBinaryVersion(sv: String): String =
     VersionNumber(sv) match {
       case VersionNumber(Seq(0, 12, _*), _, _) => "2.9.2"
-      case VersionNumber(Seq(0, 13, _*), _, _) => "2.10.6"
-      case VersionNumber(Seq(1, 0, _*), _, _)  => "2.12.3"
+      case VersionNumber(Seq(0, 13, _*), _, _) => "2.10.7"
+      case VersionNumber(Seq(1, 0, _*), _, _)  => "2.12.4"
       case _                                   => sys.error(s"Unsupported sbt binary version: $sv")
     }
 }
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index f8d470ccd..31e6b3c15 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -3,11 +3,7 @@ import Keys._
 import sbt.contraband.ContrabandPlugin.autoImport._
 
 object Dependencies {
-  val scala282 = "2.8.2"
-  val scala292 = "2.9.2"
-  val scala293 = "2.9.3"
-  val scala210 = "2.10.7"
-  val scala211 = "2.11.12"
+  // WARNING: Please Scala update versions in PluginCross.scala too
   val scala212 = "2.12.4"
   val baseScalaVersion = scala212