diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b677b7..fb800f0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11, 17]
+        java: [11, 17]
     steps:
       - uses: actions/checkout@v2
 
diff --git a/build.sbt b/build.sbt
index cc0db59..31ec2c6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -52,11 +52,9 @@ lazy val play = playProj(projectMatrix.in(file("play")), "play")(axis => _ => _.
   .dependsOn(core % "compile->compile;test->test")
 
 lazy val bench = http4sProj(projectMatrix.in(file("bench")), "bench", _ => List(Platform.Jvm))(
-  _ => platform => proj => fakeJava8Settings(platform)(sjsNowarnGlobalECSettings(platform)(proj)),
-  modScalaVersions = _ => _ => _.filterNot(_.startsWith("2.12")),
+  _ => sjsNowarnGlobalECSettings,
 )
   .settings(noPublishSettings)
-  .settings(scalacOptions --= foldScalaV(scalaVersion.value)(Seq("-Ywarn-unused:nowarn"), Seq(), Seq()))
   .dependsOn(core, http4s, play)
   .enablePlugins(JmhPlugin)
 
diff --git a/docs/installation.md b/docs/installation.md
index 6cfe585..2af9df3 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -10,3 +10,6 @@ applications. To get started, add the following to your SBT configuration:
 resolvers += "bondlink-maven-repo" at "https://raw.githubusercontent.com/mblink/maven-repo/main"
 libraryDependencies += "bondlink" %% "routing-core" % "@VERSION@"
 ```
+
+**Note:** Versions 4 and above are built for Scala 2.13.x and Scala 3, and require at least Java 11. The last version
+to support Scala 2.12 and Java 8 is 3.2.1.
diff --git a/project/Build.scala b/project/Build.scala
index a73a80d..317ecd6 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -10,7 +10,7 @@ import sbtprojectmatrix.ProjectMatrixPlugin.autoImport._
 import scala.sys.process._
 
 object Build {
-  lazy val scalaVersions = Seq("2.12.18", "2.13.12", "3.3.1")
+  lazy val scalaVersions = Seq("2.13.12", "3.3.1")
   lazy val latestScalaV = scalaVersions.find(_.startsWith("3.")).get
   lazy val kindProjector = compilerPlugin("org.typelevel" % "kind-projector" % "0.13.2" cross CrossVersion.full)
 
@@ -20,9 +20,8 @@ object Build {
     Seq("-Yprofile-trace", s"$dir/$name.trace")
   }
 
-  def foldScalaV[A](scalaVersion: String)(_212: => A, _213: => A, _3: => A): A =
+  def foldScalaV[A](scalaVersion: String)(_213: => A, _3: => A): A =
     CrossVersion.partialVersion(scalaVersion) match {
-      case Some((2, 12)) => _212
       case Some((2, 13)) => _213
       case Some((3, _)) => _3
     }
@@ -80,12 +79,10 @@ object Build {
     organization := "bondlink",
     version := currentVersion,
     scalacOptions ++= foldScalaV(scalaVersion.value)(
-      Seq("-Xsource:3"),
       Seq("-Xlint:strict-unsealed-patmat", "-Xsource:3"),
       Seq()
     ),
     libraryDependencies ++= foldScalaV(scalaVersion.value)(
-      Seq(kindProjector),
       Seq(kindProjector),
       Seq()
     ),
@@ -157,15 +154,6 @@ object Build {
       }
     }
 
-  val fakeJava8Settings: ProjSettings =
-    _ => proj =>
-      if (System.getProperty("java.version").startsWith("1.8"))
-        proj.settings(
-          Compile / scalaSource := (ThisBuild / baseDirectory).value / "fake" / "src" / "main" / "scala",
-          Test / scalaSource := (ThisBuild / baseDirectory).value / "fake" / "src" / "test" / "scala",
-        )
-      else proj
-
   def simpleProj(
     matrix: ProjectMatrix,
     nme: String,
@@ -244,8 +232,7 @@ object Build {
     case Http4sAxis.v0_23 | Http4sAxis.v1_0_0_M40 => List(Platform.Jvm, Platform.Js)
   }
   val defaultHttp4sScalaVersions = (axis: Http4sAxis.Value) => (_: Platform) => axis match {
-    case Http4sAxis.v1_0_0_M40 => (_: Seq[String]).filterNot(_.startsWith("2.12"))
-    case Http4sAxis.v0_22 | Http4sAxis.v0_23 => identity[Seq[String]] _
+    case Http4sAxis.v0_22 | Http4sAxis.v0_23 | Http4sAxis.v1_0_0_M40 => identity[Seq[String]] _
   }
 
   lazy val http4sProj = LibAxesProj(Http4sAxis.all)(
@@ -257,21 +244,16 @@ object Build {
     defaultHttp4sScalaVersions,
   )
 
-  val defaultPlaySettings = (axis: PlayAxis.Value) => axis match {
-    case PlayAxis.v2_8 => (_: Platform) => identity[Project] _
-    case PlayAxis.v2_9 | PlayAxis.v3_0 => fakeJava8Settings
-  }
   val defaultPlayPlatforms = (_: PlayAxis.Value) => List(Platform.Jvm)
   val defaultPlayScalaVersions = (axis: PlayAxis.Value) => (_: Platform) => axis match {
-    case PlayAxis.v2_9 | PlayAxis.v3_0 => (_: Seq[String]).filterNot(_.startsWith("2.12"))
-    case PlayAxis.v2_8 => identity[Seq[String]] _
+    case PlayAxis.v2_8 | PlayAxis.v2_9 | PlayAxis.v3_0 => identity[Seq[String]] _
   }
 
   lazy val playProj = LibAxesProj(PlayAxis.all)(
     _.version,
     _.suffix,
     _.suffix,
-    defaultPlaySettings,
+    _ => _ => identity[Project],
     defaultPlayPlatforms,
     defaultPlayScalaVersions,
   )