diff --git a/build.sbt b/build.sbt
index 3243570..32f9d31 100644
--- a/build.sbt
+++ b/build.sbt
@@ -12,7 +12,7 @@ enablePlugins(SbtPlugin)
 Global / sbtVersion  := "1.0.0" // must be Global, otherwise ^^ won't change anything
     crossSbtVersions := List("1.0.0")
 
-scalaVersion := "2.12.15"
+scalaVersion := "2.12.17"
 
 maxErrors := 15
 
@@ -34,7 +34,7 @@ Test /              fork := false
 Test /       logBuffered := false
 Test / parallelExecution := true
 
-scriptedLaunchOpts ++= Seq("-Xmx1024M", "-XX:MaxPermSize=256M", "-Dplugin.version=" + version.value)
+scriptedLaunchOpts ++= Seq("-Xmx1024M", "-Dplugin.version=" + version.value)
 scriptedBufferLog := true
 
 def toSbtPlugin(m: ModuleID) = Def.setting(
diff --git a/project/build.properties b/project/build.properties
index c8fcab5..72413de 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.8.3
diff --git a/src/main/scala/sbtprojectgraph/SbtProjectGraphPlugin.scala b/src/main/scala/sbtprojectgraph/SbtProjectGraphPlugin.scala
index 7c71687..c6322bb 100644
--- a/src/main/scala/sbtprojectgraph/SbtProjectGraphPlugin.scala
+++ b/src/main/scala/sbtprojectgraph/SbtProjectGraphPlugin.scala
@@ -1,6 +1,7 @@
 package sbtprojectgraph
 
-import sbt._, Keys._
+import sbt.{Node => _, _}
+import sbt.Keys._
 import sbt.internal.{ BuildStructure, LoadedBuildUnit } // sbt/sbt#3296
 
 object SbtProjectGraphPlugin extends AutoPlugin {