diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 96781abc..c66f60a3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        jdk-version: [17]
+        jdk-version: [21]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e18ad88b..1de96b75 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,11 +14,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
 
       # Docker is not installed on GitHub's MacOS hosted workers due to licensing issues
       - name: Setup docker (missing on MacOS)
diff --git a/.github/workflows/update-gradlew.yml b/.github/workflows/update-gradlew.yml
index 05c591b2..ca315c57 100644
--- a/.github/workflows/update-gradlew.yml
+++ b/.github/workflows/update-gradlew.yml
@@ -13,11 +13,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
 
       - name: Update Gradle wrapper
         uses: gradle-update/update-gradle-wrapper-action@v1
diff --git a/.github/workflows/update-protocol.yml b/.github/workflows/update-protocol.yml
index 0b40d03a..60b414b0 100644
--- a/.github/workflows/update-protocol.yml
+++ b/.github/workflows/update-protocol.yml
@@ -12,11 +12,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
 
       - name: Update protocol
         uses: gradle/gradle-build-action@v2