diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0d2ca0e..0a5a94a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,16 +9,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11]
+        java: [8, 11, 17, 21]
         scala: [2.13.x, 2.12.x]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: coursier/cache-action@v6
-    - uses: actions/setup-java@v2
+    - uses: actions/setup-java@v4
       with:
         distribution: temurin
         java-version: ${{matrix.java}}
+    - uses: sbt/setup-sbt@v1
     - name: Test
       run: sbt ++${{matrix.scala}} test
-
diff --git a/build.sbt b/build.sbt
index 85580bc..f3b8ee5 100644
--- a/build.sbt
+++ b/build.sbt
@@ -6,7 +6,7 @@ licenses := Seq(
 homepage := Some(url("http://github.com/lightbend/scala-sculpt"))
 
 scalaVersion := crossScalaVersions.value.head
-crossScalaVersions := Seq("2.13.15", "2.12.19")
+crossScalaVersions := Seq("2.13.15", "2.12.20")
 
 libraryDependencies ++= Seq(
   "org.scala-lang" % "scala-compiler" % scalaVersion.value % "provided",