diff --git a/.github/workflows/gradle-test.yml b/.github/workflows/gradle-test.yml
index 4baaa3b..6413ff1 100644
--- a/.github/workflows/gradle-test.yml
+++ b/.github/workflows/gradle-test.yml
@@ -14,10 +14,10 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v3
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
 
     - name: Test
diff --git a/build.gradle b/build.gradle
index dbb8856..ff1bf0b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,8 +14,8 @@ repositories {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 }
 
 configurations {