diff --git a/.github/workflows/ant.yml b/.github/workflows/ant.yml
index 8fd5d750..cb0b870f 100644
--- a/.github/workflows/ant.yml
+++ b/.github/workflows/ant.yml
@@ -12,6 +12,6 @@ jobs:
     - uses: actions/setup-java@v4
       with:
         distribution: 'zulu'
-        java-version: 11
+        java-version: 21
     - name: Build with Ant
       run: ant -noinput -buildfile build.xml clean compile build
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 318162ae..87b1af22 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,11 +13,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 17
+          java-version: 21
       - name: Cache SonarCloud packages
         uses: actions/cache@v4
         with:
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index e96bd61d..7c38b1e7 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -12,6 +12,6 @@ jobs:
     - uses: actions/setup-java@v4
       with:
         distribution: 'zulu'
-        java-version: 11
+        java-version: 21
     - name: Build with Maven
       run: mvn -B package --file pom.xml