diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 92ae846..8379fe1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,10 +13,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 21
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
-          java-version: "21"
+          java-version: "17"
           distribution: "temurin"
           cache: maven
 
@@ -27,10 +27,10 @@ jobs:
           TEST_COGNITO_USERNAME: ${{ secrets.TEST_COGNITO_USERNAME }}
           TEST_COGNITO_PASSWORD: ${{ secrets.TEST_COGNITO_PASSWORD }}
         run: >
-          mvn -B test --file pom.xml
+          mvn -B -Dfile.encoding=UTF-8 test --file pom.xml
 
       - name: Generate test report
         run: >
-          mvn -B
+          mvn -B -Dfile.encoding=UTF-8
           site -DgenerateReports=false
           surefire-report:report-only
diff --git a/.java-version b/.java-version
new file mode 100644
index 0000000..8e2afd3
--- /dev/null
+++ b/.java-version
@@ -0,0 +1 @@
+17
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index dd96ccb..3ec8898 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -15,7 +15,9 @@
     "bouncycastle",
     "cognitoidentityprovider",
     "Dfile",
+    "Dgenerate",
     "fiware",
+    "jenv",
     "jitpack",
     "libexec",
     "makeour",
diff --git a/README.md b/README.md
index 3496fd1..012221e 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ Set `xxxx.code-workspace` env and use it.
 ```json
 {
   "settings": {
-    "java.jdt.ls.java.home": "/opt/homebrew/opt/openjdk@21/libexec/openjdk.jdk/Contents/Home",
+    "java.jdt.ls.java.home": "/Users/xxxx/.jenv/versions/17",
     "java.test.config": {
       "env": {
         "TEST_COGNITO_USER_POOL_ID": "",
diff --git a/default.code-workspace b/default.code-workspace
index c43f207..f2a4bfc 100644
--- a/default.code-workspace
+++ b/default.code-workspace
@@ -7,7 +7,7 @@
   "settings": {
     "files.autoGuessEncoding": true,
     "files.encoding": "utf8",
-    "java.jdt.ls.java.home": "/opt/homebrew/opt/openjdk@21/libexec/openjdk.jdk/Contents/Home",
+    "java.jdt.ls.java.home": "/Users/xxxx/.jenv/versions/17",
     "java.jdt.ls.vmargs": "-Dfile.encoding=UTF-8",
     "java.configuration.updateBuildConfiguration": "interactive",
     "java.test.config": {
diff --git a/pom.xml b/pom.xml
index 7dc3838..4b42845 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,8 +16,8 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <maven.compiler.source>21</maven.compiler.source>
-    <maven.compiler.target>21</maven.compiler.target>
+    <maven.compiler.source>17</maven.compiler.source>
+    <maven.compiler.target>17</maven.compiler.target>
   </properties>
 
   <repositories>