diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e4adde8..c308124 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,10 +5,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4.2.2
       - uses: coursier/setup-action@v1.2.0-M2
         with:
-          jvm: temurin:1.17
+          jvm: temurin:1.21
           apps: sbt
       - name: Test
         run: sbt clean test scripted
diff --git a/src/main/scala/org/tmt/sbt/docs/UnidocSitePlugin.scala b/src/main/scala/org/tmt/sbt/docs/UnidocSitePlugin.scala
index d1fcb5e..4fc8ab5 100644
--- a/src/main/scala/org/tmt/sbt/docs/UnidocSitePlugin.scala
+++ b/src/main/scala/org/tmt/sbt/docs/UnidocSitePlugin.scala
@@ -27,7 +27,7 @@ object UnidocSitePlugin extends AutoPlugin {
       Seq("-Xdoclint:none", "--ignore-source-errors")
     },
     addMappingsToSiteDir(JavaUnidoc / packageDoc / mappings, JavaUnidoc / siteSubdirName),
-    ScalaUnidoc / unidoc / scalacOptions ++= Seq(s"-skip-by-id:$excludeScaladoc", "-Xfatal-warnings"),
+    ScalaUnidoc / unidoc / scalacOptions ++= Seq(s"-skip-packages", "excludeScaladoc", "-Xfatal-warnings"),
     autoAPIMappings                    := true
   )