diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dcf46582..4b338c86 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2022, 2023 SWTChart project
+# Copyright (c) 2022, 2024 SWTChart project
 #
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
@@ -22,11 +22,11 @@ jobs:
     steps:
     - name: Checkout SWTChart
       uses: actions/checkout@v3
-    - name: Set up JDK 17
+    - name: Set up JDK 11
       uses: actions/setup-java@v3
       with:
         distribution: 'temurin'
-        java-version: '17'
+        java-version: '11'
         cache: 'maven'
     - name: Build with Maven
       uses: coactions/setup-xvfb@v1
diff --git a/Jenkinsfile b/Jenkinsfile
index 7005be4c..9494fa7e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -12,7 +12,7 @@ pipeline {
 	}
 	tools {
 		maven 'apache-maven-latest'
-		jdk   'temurin-jdk17-latest'
+		jdk   'temurin-jdk11-latest'
 	}
 	stages {
 		stage('Build') {