diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ff7288e..72fe938 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         scala: [2.13]
-        java: [corretto@17]
+        java: [corretto@21]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
     steps:
@@ -42,24 +42,24 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup Java (corretto@17)
-        id: setup-java-corretto-17
-        if: matrix.java == 'corretto@17'
+      - name: Setup Java (corretto@21)
+        id: setup-java-corretto-21
+        if: matrix.java == 'corretto@21'
         uses: actions/setup-java@v4
         with:
           distribution: corretto
-          java-version: 17
+          java-version: 21
           cache: sbt
 
       - name: sbt update
-        if: matrix.java == 'corretto@17' && steps.setup-java-corretto-17.outputs.cache-hit == 'false'
+        if: matrix.java == 'corretto@21' && steps.setup-java-corretto-21.outputs.cache-hit == 'false'
         run: sbt +update
 
       - name: Cache
         uses: actions/cache@v4
         with:
           path: ~/.scio-ideaPluginIC
-          key: idea-2022.3.1
+          key: idea-242.2
 
       - name: Check that workflows are up to date
         run: sbt githubWorkflowCheck
@@ -89,7 +89,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        java: [corretto@17]
+        java: [corretto@21]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Install sbt
@@ -101,24 +101,24 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup Java (corretto@17)
-        id: setup-java-corretto-17
-        if: matrix.java == 'corretto@17'
+      - name: Setup Java (corretto@21)
+        id: setup-java-corretto-21
+        if: matrix.java == 'corretto@21'
         uses: actions/setup-java@v4
         with:
           distribution: corretto
-          java-version: 17
+          java-version: 21
           cache: sbt
 
       - name: sbt update
-        if: matrix.java == 'corretto@17' && steps.setup-java-corretto-17.outputs.cache-hit == 'false'
+        if: matrix.java == 'corretto@21' && steps.setup-java-corretto-21.outputs.cache-hit == 'false'
         run: sbt +update
 
       - name: Cache
         uses: actions/cache@v4
         with:
           path: ~/.scio-ideaPluginIC
-          key: idea-2022.3.1
+          key: idea-242.2
 
       - name: Download target directories (2.13)
         uses: actions/download-artifact@v4
diff --git a/build.sbt b/build.sbt
index a053247..f684485 100644
--- a/build.sbt
+++ b/build.sbt
@@ -23,17 +23,19 @@ lazy val Guava = "com.google.guava" % "guava" % "33.3.0-jre"
 lazy val Scalatest = "org.scalatest" %% "scalatest" % "3.2.19"
 
 // idea settings
-lazy val intelliJVersion = "2022.3.1"
+// https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html#platformVersions
+lazy val intellijBranchNumber = "242.2"
+// https://www.jetbrains.com/idea/download/other.html
+ThisBuild / intellijBuild := "242.20224.300"
 ThisBuild / intellijPluginName := "scio-idea"
 ThisBuild / intellijPlatform := IntelliJPlatform.IdeaCommunity
-ThisBuild / intellijBuild := intelliJVersion
 
 // project
 ThisBuild / tlBaseVersion := "0.1"
 ThisBuild / scalaVersion := "2.13.14"
 ThisBuild / githubWorkflowTargetBranches := Seq("main")
-ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.corretto("17"))
-ThisBuild / tlJdkRelease := Some(17)
+ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.corretto("21"))
+ThisBuild / tlJdkRelease := Some(21)
 ThisBuild / tlFatalWarnings := true
 ThisBuild / tlCiHeaderCheck := true
 ThisBuild / tlCiScalafmtCheck := true
@@ -60,7 +62,7 @@ ThisBuild / githubWorkflowGeneratedCacheSteps := Seq(
     ref = cache,
     params = Map(
       "path" -> "~/.scio-ideaPluginIC",
-      "key" -> s"idea-$intelliJVersion"
+      "key" -> s"idea-$intellijBranchNumber"
     )
   )
 )
@@ -76,14 +78,13 @@ lazy val scioIdeaPlugin: Project = project
     intellijPlugins += "org.intellij.scala".toPlugin,
     patchPluginXml := pluginXmlOptions { xml =>
       xml.version = version.value
-      // https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html#platformVersions
-      xml.sinceBuild = "223" // for 2022.3
+      xml.sinceBuild = intellijBuild.value
     },
     pluginVerifierOptions := pluginVerifierOptions.value.copy(
       // verify against latest IntelliJ IDEA Community
       overrideIDEs = Seq(
         intellijBaseDirectory.value.toString,
-        "[latest-IC]"
+        "[latest-release-IC]"
       ),
       // allow experimental API usages
       failureLevels = FailureLevel.ALL.asScala
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 7ecac85..9635470 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,3 +1,3 @@
-addSbtPlugin("org.jetbrains" % "sbt-idea-plugin" % "4.0.1")
+addSbtPlugin("org.jetbrains" % "sbt-idea-plugin" % "4.0.1" withSources())
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.7.3")