diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4077a990..bcb800c5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,11 +24,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 17
       - name: Cache Gradle
         uses: actions/cache@v3
         env:
-          java-version: 8
+          java-version: 17
         with:
           path: |
             ~/.gradle/caches
@@ -52,11 +52,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 17
       - name: Cache Gradle
         uses: actions/cache@v3
         env:
-          java-version: 8
+          java-version: 17
         with:
           path: |
             ~/.gradle/caches
@@ -81,11 +81,11 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 11
+          java-version: 17
       - name: Cache SonarCloud packages
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 99f92e51..c44c8b9f 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -33,7 +33,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        java: [ 8, 11, 17 ]
+        java: [ 17 ]
     needs: [ validation, commitlint ]
     runs-on: ${{ matrix.os }}
     steps:
@@ -81,12 +81,12 @@ jobs:
         if: env.SONAR_TOKEN != null
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         if: env.SONAR_TOKEN != null
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 11
+          java-version: 17
       - name: Cache SonarCloud packages
         if: env.SONAR_TOKEN != null
         uses: actions/cache@v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index dac3c5db..2e277cd9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,11 +20,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 17
       - name: Cache Gradle
         uses: actions/cache@v3
         env:
-          java-version: 8
+          java-version: 17
         with:
           path: |
             ~/.gradle/caches
@@ -48,11 +48,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 17
       - name: Cache Gradle
         uses: actions/cache@v3
         env:
-          java-version: 8
+          java-version: 17
         with:
           path: |
             ~/.gradle/caches
diff --git a/gradle.properties b/gradle.properties
index 9c7fa5e5..5eaa14bc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -16,7 +16,7 @@
 # DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 # FROM, OUT OF OR IN CONNECTION WITH THE  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
-version=14.1.1-SNAPSHOT
+version=15.0.0-SNAPSHOT
 ### Project Metadata
 group=com.graphql-java-kickstart
 PROJECT_NAME=graphql-spring-boot
@@ -26,8 +26,8 @@ PROJECT_LICENSE=MIT
 PROJECT_LICENSE_URL=https://github.com/graphql-java-kickstart/spring-boot-graphql/blob/master/LICENSE.md
 VCS=Git
 ###
-SOURCE_COMPATIBILITY=1.8
-TARGET_COMPATIBILITY=1.8
+SOURCE_COMPATIBILITY=17
+TARGET_COMPATIBILITY=17
 ### Dependencies
 LIB_GRAPHQL_JAVA_VER=19.3
 LIB_EXTENDED_SCALARS_VER=19.1