diff --git a/.github/workflows/gradle-publish.yml b/.github/workflows/gradle-publish.yml
index b04dedb..d58a9d6 100644
--- a/.github/workflows/gradle-publish.yml
+++ b/.github/workflows/gradle-publish.yml
@@ -44,10 +44,10 @@ jobs:
       - name: REUSE Compliance Check
         uses: fsfe/reuse-action@v5
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Generate versions
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 9851bdb..3bc248f 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -34,10 +34,10 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@cc4fc85e6b35bafd578d5ffbc76a5518407e1af0
@@ -50,10 +50,10 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
       # Generates and submits a dependency graph, enabling Dependabot Alerts for all project dependencies.
       # See: https://github.com/gradle/actions/blob/main/dependency-submission/README.md
diff --git a/build.gradle.kts b/build.gradle.kts
index 7dc09a0..714c319 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -46,12 +46,12 @@ subprojects {
         kotlinOptions {
             freeCompilerArgs += "-Xjsr305=strict"
             freeCompilerArgs += "-Xcontext-receivers"
-            jvmTarget = "17"
+            jvmTarget = "21"
         }
     }
 
     java {
-        sourceCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_21
     }
 
     val javadocJar: TaskProvider<Jar> by tasks.registering(Jar::class) {